Long Multiplication: 310 × 7

"Long Multiplication Calculator" Calculator

Multiplicand (number to be multiplied)

Multiplier (number to multiply by)

What is 310 × 7?

Answer

310 × 7 = 2,170

310 × 7 and 7 × 310 are the same product — the order of the factors never changes the answer, only the working. Below, 310 is multiplied by 7 in a column, digit by digit.

310 × 7 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.

  310
×   7
 2170
310 × 7 = 2,170

Step-by-Step Solution

Step 1: Multiply the multiplicand by the last digit of the multiplier, 7: 310 × 7 = 2,170.

  • 0 × 7 = 0. Write 0.
  • 1 × 7 = 7. Write 7.
  • 3 × 7 = 21. Write 1 and carry 2.
  • No digits are left, so the carried 2 is written in front: the partial product is 2,170.

310 × 7

=

2,170

Check It, and What It Is Not

Check by dividing back. Multiplication and division undo each other, so 2,170 ÷ 7 = 310 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.

310 × 7 is a number, not an area. If those are the sides of a room in feet, the answer is 2,170 square feet — the same arithmetic, a different question, and it is answered by the square footage calculator.

See Also

About "Long Multiplication Calculator" 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 310 × 7? (The answer is: 2,170). Enter the multiplicand (e.g. '310') and the multiplier (e.g. '7') and hit the button. The order of the two numbers does not matter — 310 × 7 and 7 × 310 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.

"Long Multiplication Calculator" Calculator

Multiplicand (number to be multiplied)

Multiplier (number to multiply by)

Products of 310

MultiplicationProduct
210 × 71,470
220 × 71,540
230 × 71,610
240 × 71,680
250 × 71,750
260 × 71,820
270 × 71,890
280 × 71,960
290 × 72,030
300 × 72,100
310 × 72,170
320 × 72,240
330 × 72,310
340 × 72,380
350 × 72,450
360 × 72,520
370 × 72,590
380 × 72,660
390 × 72,730
400 × 72,800

FAQ

What is 310 × 7?

310 × 7 = 2,170

Is 310 × 7 the same as 7 × 310?

Yes. Multiplication is commutative, so both come to 2,170. Only the working differs: this page multiplies by 7, which gives a single partial product.

How do you check that 310 × 7 = 2,170?

Divide the product back by one of the factors: 2,170 ÷ 7 = 310 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 310 × 7?

There is only one: the multiplier 7 has a single digit, so 310 × 7 = 2,170 is written straight under the line, with no addition step.

See Also