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    Long Multiplication: 40 × 40

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

    What is 40 × 40?

    Answer

    40 × 40 =
    1,600

    One partial product: the only non-zero digit of 40 is 4, and it stands for 4 × 10: 40 × 40 = 1,600.

    40 × 40 in a column

    40
    ×40
    1600

    In the column: product 1,600.

    Step by step: 40 × 40

    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 4, and it stands for 40: 40 × 40 = 1,600.
      • 0 × 4 = 0. Write 0.
      • 4 × 4 = 16. Write 6 and carry 1.
      • No digits are left, so the carried 1 is written in front: the partial product is 160.
    3. Product1,600

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    https://calculat.io/en/number/long-multiplication/40--40Copy
    <a href="https://calculat.io/en/number/long-multiplication/40--40">40 × 40 = 1,600 - Long Multiplication - Calculatio</a>Copy
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    40 × 40 = 1,600 - Long Multiplication. 40 × 40 = 1,600. Long multiplication step by step: every carry, every partial product and the final sum.
    https://calculat.io/en/number/long-multiplication/40--40/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 × 40?

    40 × 40 = 1,600

    Is 1,600 a square number?

    Yes. 40 × 40 = 1,600, so 1,600 is the square of 40. A square is simply a number multiplied by itself, which is why both factors here are the same.

    How do you check that 40 × 40 = 1,600?

    Divide the product back by one of the factors: 1,600 ÷ 40 = 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 × 40?

    Only one of them counts: every other digit of 40 is a zero and contributes nothing, so the work comes down to 40 × 40 = 1,600, with nothing left to add.

    See Also