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    Long Multiplication: 21 × 2

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

    What is 21 × 2?

    Answer

    21 × 2 =
    42

    One partial product: 21 × 2 = 42. 2 × 21 gives the same 42.

    21 × 2 in a column

    21
    ×2
    42

    In the column: product 42.

    Step by step: 21 × 2

    1. Step 1Multiply the multiplicand by the last digit of the multiplier, 2: 21 × 2 = 42.
      • 1 × 2 = 2. Write 2.
      • 2 × 2 = 4. Write 4.
    2. Product42

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    21 × 2 = 42 - Long Multiplication. 21 × 2 = 42. 2 × 21 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/21--2/generated.jpgCopy

    Products of 21

    MultiplicationProduct
    11 × 222
    12 × 224
    13 × 226
    14 × 228
    15 × 230
    16 × 232
    17 × 234
    18 × 236
    19 × 238
    20 × 240
    21 × 242
    22 × 244
    23 × 246
    24 × 248
    25 × 250
    26 × 252
    27 × 254
    28 × 256
    29 × 258
    30 × 260
    Recalculate with different values ↑

    FAQ

    What is 21 × 2?

    21 × 2 = 42

    Is 21 × 2 the same as 2 × 21?

    Yes. Multiplication is commutative, so both come to 42. Only the working differs: this page multiplies by 2, which gives a single partial product.

    How do you check that 21 × 2 = 42?

    Divide the product back by one of the factors: 42 ÷ 2 = 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 × 2?

    There is only one: the multiplier 2 has a single digit, so 21 × 2 = 42 is written straight under the line, with no addition step.

    See Also