Long Multiplication: 57 × 8
What is 57 × 8?
Answer
57 × 8 and 8 × 57 are the same product — the order of the factors never changes the answer, only the working. Below, 57 is multiplied by 8 in a column, digit by digit.
57 × 8 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.
| 5 | 7 | ||
| × | 8 | ||
| 4 | 5 | 6 |
Step-by-Step Solution
Step 1: Multiply the multiplicand by the last digit of the multiplier, 8: 57 × 8 = 456.
- 7 × 8 = 56. Write 6 and carry 5.
- 5 × 8 = 40, plus the carried 5 makes 45. Write 5 and carry 4.
- No digits are left, so the carried 4 is written in front: the partial product is 456.
57 × 8
=456
Check It, and What It Is Not
Check by dividing back. Multiplication and division undo each other, so 456 ÷ 8 = 57 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.
57 × 8 is a number, not an area. If those are the sides of a room in feet, the answer is 456 square feet — the same arithmetic, a different question, and it is answered by the square footage calculator.
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See Also
- Times Table Chart - Any number from 1 to 100, rows from ×1 to ×12
- Long Division Calculator - Step-by-step long division with detailed explanation
- Multiplying Fractions Calculator - Multiply fractions, mixed numbers and whole numbers step by step
- Factors of a Number - List all Factors and Factor Pairs of a Number
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
<a href="https://calculat.io/en/number/long-multiplication/57--8">57 × 8 = 456 - Long Multiplication - Calculatio</a>