None.
There is no such measure a s a centermeter although there is centimetre.
Also, there is no measure of distance whose abbreviation is dmm.
420 centermeters are in 4.2m
3.9 centimetres (not centermeters) = 1.54 inches.
218.5
By centermeters, do you mean centimeters? If so, there are 121.92 centimeters in 4 feet.
91.44 cm
10
100,000
10.16
5.1
1ft = 30.48cm
7
the answer is 58