Here are some examples of large numbers being used in measurements. On this page we see how large numbers are used for measurements in the metric system.

mm = millimetre cm = centimetre m = metre km = kilometre 1 cm = 10 mm (one centimetre = ten millimetres) 1 m = 100 cm (one metre = hundred centimetres) 1 km = 1000 m (one kilometre = one thousand metres) 1 km = 1000 000 mm (one kilometre = one million millimetres) 1000 km = 1000 000 000 mm (one thousand kilometres = one billion millimetres)