630 mm = 630/10 = 63 cm
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64 cm is greater than 630 mm which equals 63 cm
64 cm is 1 cm greater than 630 mm
1 cm = 10 mm64 cm =640 mmSo 64 cm is larger than 630 mm.
To convert cm^2 to mm^2, you need to multiply by 100. So, 6.3 cm^2 is equal to 630 mm^2.
1 cm = 10 mm 2 cm = 20 mm . . 10 cm = 100 mm . . 15 cm = 150 mm