Long Multiplication: 42 × 9

Long Multiplication Calculator
Multiplicand (number to be multiplied)
Multiplier (number to multiply by)

What is 42 × 9?

Answer

42 × 9 =
378

One partial product: 42 × 9 = 378. 9 × 42 gives the same 378.

42 × 9 in a column

42
×9
378

In the column: product 378.

Step by step: 42 × 9

  1. Step 1Multiply the multiplicand by the last digit of the multiplier, 9: 42 × 9 = 378.
    • 2 × 9 = 18. Write 8 and carry 1.
    • 4 × 9 = 36, plus the carried 1 makes 37. Write 7 and carry 3.
    • No digits are left, so the carried 3 is written in front: the partial product is 378.
  2. Product378

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Recalculate with different values ↑

Products of 42

MultiplicationProduct
32 × 9288
33 × 9297
34 × 9306
35 × 9315
36 × 9324
37 × 9333
38 × 9342
39 × 9351
40 × 9360
41 × 9369
42 × 9378
43 × 9387
44 × 9396
45 × 9405
46 × 9414
47 × 9423
48 × 9432
49 × 9441
50 × 9450
51 × 9459

FAQ

What is 42 × 9?

42 × 9 = 378

Is 42 × 9 the same as 9 × 42?

Yes. Multiplication is commutative, so both come to 378. Only the working differs: this page multiplies by 9, which gives a single partial product.

How do you check that 42 × 9 = 378?

Divide the product back by one of the factors: 378 ÷ 9 = 42 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 42 × 9?

There is only one: the multiplier 9 has a single digit, so 42 × 9 = 378 is written straight under the line, with no addition step.

See Also