There is no equivalence.
A cm is a measure of length or distance while a square cm is a measure of area. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.
How many inches is 38 cm
How many cm are in 14 inches
1
12.6 cm is about 4.96 cm
1,738,000 cm
5 cm
53.34 cm
4.6
56 cm
7 cm
20,120 cm
2 cm