40 multiplied by 21 is 840

40 × 21 = 840

Explanation: Multiplication is repeated addition. So, 40 × 21 means adding 40, 21 times:

40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 + 40 = 840

Word Problem Style

If you have 21 boxes and each box contains 40 apples, then the total number of apples is 840.

Quick Facts

Multiplication Table for 40

40 × NResult
40 × 140
40 × 280
40 × 3120
40 × 4160
40 × 5200
40 × 6240
40 × 7280
40 × 8320
40 × 9360
40 × 10400
40 × 11440
40 × 12480

Explore More Multiplications