Quick Answer

21 × 20

21 × 20 = 420. To multiply 21 by 20, add 21 to itself 20 times, or use the standard multiplication algorithm. 21 × 20 = 420.

420

21 × 20 = 420

How to Calculate 21 × 20

To multiply 21 by 20, add 21 to itself 20 times, or use the standard multiplication algorithm. 21 × 20 = 420.

Expression21 × 20

Answer420

21 × 20 = 420

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