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    Long Multiplication: 40 × 20

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

    What is 40 × 20?

    Answer

    40 × 20 =
    800

    One partial product: the only non-zero digit of 20 is 2, and it stands for 2 × 10: 40 × 20 = 800. 20 × 40 gives the same 800.

    40 × 20 in a column

    40
    ×20
    800

    In the column: product 800.

    Step by step: 40 × 20

    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 2, and it stands for 20: 40 × 20 = 800.
      • 0 × 2 = 0. Write 0.
      • 4 × 2 = 8. Write 8.
    3. Product800

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    40 × 20 = 800 - Long Multiplication. 40 × 20 = 800. 20 × 40 gives the same product. Long multiplication step by step: every carry, every partial product and the final sum.
    https://calculat.io/en/number/long-multiplication/40--20/generated.jpgCopy

    Products of 40

    MultiplicationProduct
    40 × 280
    40 × 3120
    40 × 4160
    40 × 5200
    40 × 6240
    40 × 7280
    40 × 8320
    40 × 9360
    40 × 10400
    40 × 11440
    40 × 12480
    40 × 15600
    40 × 16640
    40 × 20800
    40 × 251,000
    40 × 301,200
    40 × 401,600
    Recalculate with different values ↑

    FAQ

    What is 40 × 20?

    40 × 20 = 800

    Is 40 × 20 the same as 20 × 40?

    Yes. Multiplication is commutative, so both come to 800. Only the working differs: this page multiplies by 20, which gives a single partial product.

    How do you check that 40 × 20 = 800?

    Divide the product back by one of the factors: 800 ÷ 20 = 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 × 20?

    Only one of them counts: every other digit of 20 is a zero and contributes nothing, so the work comes down to 40 × 20 = 800, with nothing left to add.

    See Also