Long Multiplication: 40 × 10

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

What is 40 × 10?

Answer

40 × 10 =
400

One partial product: the only non-zero digit of 10 is 1, and it stands for 1 × 10: 40 × 10 = 400. 10 × 40 gives the same 400.

40 × 10 in a column

40
×10
400

In the column: product 400.

Step by step: 40 × 10

  1. Step 1The last digit of the multiplier is 0, so this partial product is 0 and adds nothing to the total.
  2. Step 2The next digit of the multiplier is 1, and it stands for 10: 40 × 10 = 400.
    • 0 × 1 = 0. Write 0.
    • 4 × 1 = 4. Write 4.
  3. Product400

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Recalculate with different values ↑

Products of 40

MultiplicationProduct
10 × 10100
11 × 10110
12 × 10120
15 × 10150
16 × 10160
20 × 10200
25 × 10250
30 × 10300
40 × 10400
50 × 10500
60 × 10600
75 × 10750
80 × 10800
90 × 10900
100 × 101,000

FAQ

What is 40 × 10?

40 × 10 = 400

Is 40 × 10 the same as 10 × 40?

Yes. Multiplication is commutative, so both come to 400. Only the working differs: this page multiplies by 10, which gives a single partial product.

How do you check that 40 × 10 = 400?

Divide the product back by one of the factors: 400 ÷ 10 = 40 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 40 × 10?

Only one of them counts: every other digit of 10 is a zero and contributes nothing, so the work comes down to 40 × 10 = 400, with nothing left to add.

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