Solution - Long multiplication
91
Step-by-step explanation
1. Rewrite the numbers from top to bottom aligned to the right
| Place value | tens | ones |
| 1 | 3 | |
| × | 7 | |
2. Multiply the numbers using long multiplication method
Start by multiplying the ones digit (7) of the multiplier 7 by each digit of the multiplicand 13, from right to left.
Multiply the ones digit (7) of the multiplicator by the number in the ones place value:
7×3=21
Write 1 in the ones place.
Because the result is greater than 9, carry the 2 to the tens place.
| Place value | tens | ones |
| 2 | ||
| 1 | 3 | |
| × | 7 | |
| 1 |
Multiply the ones digit (7) of the multiplicator by the number in the tens place value and add the carried number (2):
7×1+2=9
Write 9 in the tens place.
| Place value | tens | ones |
| 2 | ||
| 1 | 3 | |
| × | 7 | |
| 9 | 1 |
The solution is: 91
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