KHDMDCM
77 millimeters to meters is 0.077 meters
There is a formula that is used
K: Kilo
H:Hecta
D:Deca
M: meters
D:deci
C: centi
M:milli
U need to move the decimal around
if its at 77 millimeters u need to move the imaginary decimal 3 places to the left and u get 0.077 meters