The number which has to be put in simplest form:
n= 210 × 20=4200
Factorizing 210 and 20 in terms of prime factors,
210 = 2 × 3 × 5 × 7
20= 2 × 2× 5
210 × 20=4200
= 2× 3× 5×7×2×2×5
= 2×2×2×3×5×5×7
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