The Neanderthal brain was the same size as modern human.
420 centermeters are in 4.2m
3.9 centimetres (not centermeters) = 1.54 inches.
218.5
The Neanderthal's brain was the same size as a modern human's brain.
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