In order to get the required value, we are to use the following converion factor;
1cm^2 = 100mm^2
To convert 953 cm^2 to mm^2, we will say;
1cm^2 = 100mm^2
953cm^2 = x
Then we will calculate x by cross multiplying;
1 * x = 953 * 100
x = 953 * 100
x = 95,300mm^2
Hence the question mark will be replaced by 95,300mm^2
