Long Multiplication: 420 × 9

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

What is 420 × 9?

Answer

420 × 9 =
3,780

One partial product: 420 × 9 = 3,780. 9 × 420 gives the same 3,780.

420 × 9 in a column

420
×9
3780

In the column: product 3,780.

Step by step: 420 × 9

  1. Step 1Multiply the multiplicand by the last digit of the multiplier, 9: 420 × 9 = 3,780.
    • 0 × 9 = 0. Write 0.
    • 2 × 9 = 18. Write 8 and carry 1.
    • 4 × 9 = 36, plus the carried 1 makes 37. Write 7 and carry 3.
    • No digits are left, so the carried 3 is written in front: the partial product is 3,780.
  2. Product3,780

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Recalculate with different values ↑

Products of 420

MultiplicationProduct
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
500 × 94,500
510 × 94,590

FAQ

What is 420 × 9?

420 × 9 = 3,780

Is 420 × 9 the same as 9 × 420?

Yes. Multiplication is commutative, so both come to 3,780. Only the working differs: this page multiplies by 9, which gives a single partial product.

How do you check that 420 × 9 = 3,780?

Divide the product back by one of the factors: 3,780 ÷ 9 = 420 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 420 × 9?

There is only one: the multiplier 9 has a single digit, so 420 × 9 = 3,780 is written straight under the line, with no addition step.

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