Well, honey, if you're looking for a math lesson, I'll give it to you straight. 21 times 21 equals 441. Now go impress your friends with that little nugget of knowledge.
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147x3 = 441 x3 = 441/147 x3 = 3 x = 31/3 x ≈ 1.4
The area is 441 times pi.
147
Of the infinite number of possible answers, the simplest is 1 times 330
1, 3, 7, 9, 21, 49, 63, 147, 441