I am not trying to be mean but you asked the question wrong it should be what are the multiples of 7?
7/2
6 x 7 = 42
84 = 2 * 2 * 3 * 7
Use a calculator!
radius square mutiplied by pi.thus pi equals 22/7 or 3.143.
667,911
1080
52
2,808
144
100
Its product.