297 x 420 x 2 = 0
(297 x 420) = 124740
(124740) x 2 = 249480
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420 = 2 x 2 x 3 x 5 x 7
2 x 2 x 3 x 5 x 7 = 420
420 = 2 x 2 x 3 x 5 x 7
2 x 2 x 3 x 5 x 7 = 420
420 has 5 prime factors, four of which are different prime numbers. Prime factors of 420 are 2 x 2 x 5 x 3 x 7.