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    Long Multiplication: 400 × 9

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

    What is 400 × 9?

    Answer

    400 × 9 =
    3,600

    400 × 9 and 9 × 400 are the same product — the order of the factors never changes the answer, only the working. Below, 400 is multiplied by 9 in a column, digit by digit.

    400 × 9 in a Column

    The multiplicand goes on top, the multiplier underneath, both aligned on the right. The multiplier has a single digit, so there is one partial product and the answer goes straight under the line.

      400
    ×   9
     3600
    400 × 9 = 3,600

    Step-by-Step Solution

    Step 1: Multiply the multiplicand by the last digit of the multiplier, 9: 400 × 9 = 3,600.

    • 0 × 9 = 0. Write 0.
    • 0 × 9 = 0. Write 0.
    • 4 × 9 = 36. Write 6 and carry 3.
    • No digits are left, so the carried 3 is written in front: the partial product is 3,600.

    400 × 9

    =

    3,600

    Check It, and What It Is Not

    Check by dividing back. Multiplication and division undo each other, so 3,600 ÷ 9 = 400 must come out exactly, with no remainder.

    Fractions are a different calculation. Both factors here are whole numbers; for 2/3 or 2 3/4 use the fraction multiplication calculator, which multiplies numerators and denominators separately.

    400 × 9 is a number, not an area. If those are the sides of a room in feet, the answer is 3,600 square feet — the same arithmetic, a different question, and it is answered by the square footage calculator.

    Related Calculations

    See Also

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    400 × 9 = 3,600 - Long Multiplication. 400 × 9 = 3,600. 9 × 400 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/400--9/generated.jpgCopy

    Products of 400

    MultiplicationProduct
    300 × 92,700
    310 × 92,790
    320 × 92,880
    330 × 92,970
    340 × 93,060
    350 × 93,150
    360 × 93,240
    370 × 93,330
    380 × 93,420
    390 × 93,510
    400 × 93,600
    410 × 93,690
    420 × 93,780
    430 × 93,870
    440 × 93,960
    450 × 94,050
    460 × 94,140
    470 × 94,230
    480 × 94,320
    490 × 94,410

    Long Multiplication Calculator

    This calculator multiplies two whole numbers the way it is done on paper: digit by digit, carrying where the column overflows, then adding the partial products together. For example, it can help you find out what is 400 × 9? (The answer is: 3,600). Enter the multiplicand (e.g. '400') and the multiplier (e.g. '9') and hit the button. The order of the two numbers does not matter — 400 × 9 and 9 × 400 are the same product — so either number can go on top. Fractions and mixed numbers belong to the fraction multiplication calculator, and the reverse operation is long division.
    Recalculate with different values ↑

    FAQ

    What is 400 × 9?

    400 × 9 = 3,600

    Is 400 × 9 the same as 9 × 400?

    Yes. Multiplication is commutative, so both come to 3,600. Only the working differs: this page multiplies by 9, which gives a single partial product.

    How do you check that 400 × 9 = 3,600?

    Divide the product back by one of the factors: 3,600 ÷ 9 = 400 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

    What are the partial products of 400 × 9?

    There is only one: the multiplier 9 has a single digit, so 400 × 9 = 3,600 is written straight under the line, with no addition step.

    See Also