This example problem demonstrates how to convert millimeters to centimeters.

### Problem:

Express 312 millimeters in centimeters.

### Solution:

1 centimeter = 10 millimeters

Set up the conversion so the desired unit will be cancelled out. In this case, we want cm to be the remaining unit.

distance in cm = (distance in mm) x (1 cm/10 cm)

distance in cm = (312/10) cm

distance in cm = 3.12 cm

### Answer:

312 millimeters is 3.12 centimeters.