The metric system. (cenimeters, meters, milimeters)
1 centimetre = 10 millimetres so 200 cm = 2000 mm.
40 cm = 400 mm
40 centimeters = 400 millimeters
4000
0.04 meter
1 decimeter = 100 millimeters, so 40 decimeters = 100 * 40 millimeters, or 4000.
400 millimeters equals 40 centimeters.
There are no such measures as cemeters or cenimeters so the question makes no sense.
.8 milimeters
152= how many milimeters
500000 milimeters