Quick Answer

40 × 42

40 × 42 = 1680. To multiply 40 by 42, add 40 to itself 42 times, or use the standard multiplication algorithm. 40 × 42 = 1680.

1680

40 × 42 = 1680

How to Calculate 40 × 42

To multiply 40 by 42, add 40 to itself 42 times, or use the standard multiplication algorithm. 40 × 42 = 1680.

Expression40 × 42

Answer1680

40 × 42 = 1680

Similar multiplication calculations you might need.

Use our full calculator for any arithmetic operation.