Long Multiplication: 80 × 80

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

What is 80 × 80?

Answer

80 × 80 =
6,400

One partial product: the only non-zero digit of 80 is 8, and it stands for 8 × 10: 80 × 80 = 6,400.

80 × 80 in a column

80
×80
6400

In the column: product 6,400.

Step by step: 80 × 80

  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 8, and it stands for 80: 80 × 80 = 6,400.
    • 0 × 8 = 0. Write 0.
    • 8 × 8 = 64. Write 4 and carry 6.
    • No digits are left, so the carried 6 is written in front: the partial product is 640.
  3. Product6,400

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Recalculate with different values ↑

Products of 80

MultiplicationProduct
80 × 3240
80 × 4320
80 × 5400
80 × 6480
80 × 7560
80 × 8640
80 × 9720
80 × 10800
80 × 11880
80 × 12960
80 × 151,200
80 × 161,280
80 × 201,600
80 × 252,000
80 × 302,400
80 × 403,200
80 × 504,000
80 × 604,800
80 × 756,000
80 × 806,400

FAQ

What is 80 × 80?

80 × 80 = 6,400

Is 6,400 a square number?

Yes. 80 × 80 = 6,400, so 6,400 is the square of 80. A square is simply a number multiplied by itself, which is why both factors here are the same.

How do you check that 80 × 80 = 6,400?

Divide the product back by one of the factors: 6,400 ÷ 80 = 80 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 80 × 80?

Only one of them counts: every other digit of 80 is a zero and contributes nothing, so the work comes down to 80 × 80 = 6,400, with nothing left to add.

See Also