Long Multiplication: 21 × 3

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

What is 21 × 3?

Answer

21 × 3 =
63

One partial product: 21 × 3 = 63. 3 × 21 gives the same 63.

21 × 3 in a column

21
×3
63

In the column: product 63.

Step by step: 21 × 3

  1. Step 1Multiply the multiplicand by the last digit of the multiplier, 3: 21 × 3 = 63.
    • 1 × 3 = 3. Write 3.
    • 2 × 3 = 6. Write 6.
  2. Product63

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Recalculate with different values ↑

Products of 21

MultiplicationProduct
11 × 333
12 × 336
13 × 339
14 × 342
15 × 345
16 × 348
17 × 351
18 × 354
19 × 357
20 × 360
21 × 363
22 × 366
23 × 369
24 × 372
25 × 375
26 × 378
27 × 381
28 × 384
29 × 387
30 × 390

FAQ

What is 21 × 3?

21 × 3 = 63

Is 21 × 3 the same as 3 × 21?

Yes. Multiplication is commutative, so both come to 63. Only the working differs: this page multiplies by 3, which gives a single partial product.

How do you check that 21 × 3 = 63?

Divide the product back by one of the factors: 63 ÷ 3 = 21 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 21 × 3?

There is only one: the multiplier 3 has a single digit, so 21 × 3 = 63 is written straight under the line, with no addition step.

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