a planck length is the distance travelled while moving at the speed of light for one planck time and works out at 10 million million million million million million millionths of a kilometre or... 1 ^ -33 centimetres*

the speed of light is very nearly 300000 kilometres each second

300000 km per second divided by ten = 30000 kilometre in a tenth of a second

30000 km divided by ten = 3000 km in 100th of a second

3000 km divided by ten = 300 km in 1000th of a second

300 km divided by ten = 30 km in 10 000th of a second

30 km divided by ten = 3 km in 100 000th of a second

3 km divided by ten = 300 metres in 1 000 000th of a second

300 metres divided by ten = 30 metres in 10 000 000th of a second

30 metres divided by ten = 3 metres in 100 000 000th of a second

3 metres divided by ten = 300 centimetres in 1 000 000 000th of a second

300 centimetres divided by ten = 30 centimetres in 10 000 000 000th of a second

30 cm divided by ten = 3 cm in 100 000 000 000th of a second

3 cm divided by ten = 0.3 of a cm in 1 000 000 000 000th of a second

0.3 cm divided by ten = 0.03 of a cm in 10 000 000 000 0000th of a second

0.03 cm divided by ten = 0.003 of a cm in 100 000 000 000 000th of a second

0.003 cm divided by ten = 0.0003 of a cm in 1 000 000 000 000 000th of a second

0.0003 cm divided by ten = 0.00003 of a cm in 10 000 000 000 000 000th of a second

0.00003 cm divided by ten = 0.000003 of a cm in 100 000 000 000 000 000th of a second

0.000003 cm divided by ten = 0.0000003 of a cm in 1 000 000 000 000 000 000th of a second

0.0000003 cm divided by ten = 0.00000003 of a cm in 10 000 000 000 000 000 000th of a second

0.00000003 cm divided by ten = 0.000000003 of a cm in 100 000 000 000 000 000 000th of a second

0.000000003 cm divided by ten = 0.0000000003 of a cm in 1 000 000 000 000 000 000 000th of a second

0.0000000003 cm divided by ten = 0.00000000003 of a cm in 10 000 000 000 000 000 000 000th of a second

0.00000000003 cm divided by ten = 0.00000000003 of a cm in 100 000 000 000 000 000 000 000th of a second

0.000000000003 cm divided by ten = 0.000000000003 of a cm in 1 000 000 000 000 000 000 000 000th of a second

0.0000000000003 cm divided by ten = 0.0000000000003 of a cm in 10 000 000 000 000 000 000 000 000th of a second

0.00000000000003 cm divided by ten = 0.00000000000003 of a cm in 100 000 000 000 000 000 000 000 000th of a second

0.000000000000003 cm divided by ten = 0.000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000003 cm divided by ten = 0.0000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000th of a second

0.00000000000000003 cm divided by ten = 0.00000000000000003 of a cm in 100 000 000 000 000 000 000 000 000 000th of a second

0.000000000000000003 cm divided by ten = 0.000000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000000003 cm divided by ten = 0.0000000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000 000th of a second

0.00000000000000000003 cm divided by ten = 0.00000000000000000003 of a cm in 100 000 000 000 000 000 000 000 000 000 000th of a second

0.000000000000000000003 cm divided by ten = 0.000000000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000000000003 cm divided by ten = 0.0000000000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000 000 000th of a second

0.00000000000000000000003 cm divided by ten = 0.00000000000000000000003 of a cm in 100 000 000 000 000 000 000 000 000 000 000 000th of a second

0.000000000000000000000003 cm divided by ten = 0.000000000000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000000000000003 cm divided by ten = 0.0000000000000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.00000000000000000000000003 cm divided by ten = 0.00000000000000000000000003 of a cm in 100 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.000000000000000000000000003 cm divided by ten = 0.000000000000000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000000000000000003 cm divided by ten = 0.0000000000000000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.00000000000000000000000000003 cm divided by ten = 0.00000000000000000000000000003 of a cm in 100 000 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.000000000000000000000000000003 cm divided by ten = 0.000000000000000000000000000003 of a cm in 1 000 000 000 000 000 000 000 000 000 000 000 000 000 000th of a second

0.0000000000000000000000000000003 cm divided by ten = 0.0000000000000000000000000000003 of a cm in 10 000 000 000 000 000 000 000 000 000 000 000 000 000 000th of a second

*to be precise the speed of light is 299 792 458 metres a second which makes the 1 -33 of a centimetre number at the top of the page bigger than it actually is

if you want to be absolutely accurate divide the 299 792 458 number by ten 43 times