Metric prefixes range from factors of 10 -18 to 10 18 based on a decimal system, with the base in this case the meter having no prefix and having a factor of 1.
In this case we should multiply 10 Meters by 39.
When going in reverse, from m to cm, you multiply by 100.
Note: First, you will learn how to convert cm into m by hand and then later on using a calculator.
Throughout the explanation below I might also call it 10 m to cm.
A corresponding unit of volume is the cubic centimetre.