For this case we must make a conversion of centimeters to millimeters. By definition we have to:
1 cm equals 10 mm
By making a rule of three we have:
1 cm ---------> 10 mm
5.6 cm --------> x
Where "x" represents the quantity in millimeters.

Thus, we have that 5.6 centimeters equals 56 millimeters.
Answer:
56mm