proszę o pomoc jak obczyc. cm

1km = 1000 m 1 km = 10000 dm 1 km = 100000 cm 1 km = 1000000 mm 1m = 10 dm 1m = 100 cm 1m = 1000 mm 1dm = 10 cm 1 dm = 100 mm 1cm = 10 mm