Use multiplication:
2404 x 13:
Line up our numbers vertically:
2 | 4 | 0 | 4 | |
x | 1 | 3 |
Current result: 3 x 4 = 12
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
2 |
Show value = 2
Carry value = 1
Step 2:
Last step carry value was 1.
Our current result equals:
3 x 0 + Carry value of 1 = 1
1 | |||||||
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
1 | 2 |
Show value = 1
Current result: 3 x 4 = 12
1 | |||||||
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
2 | 1 | 2 |
Show value = 2
Carry value = 1
Step 4:
Last step carry value was 1.
Our current result equals:
3 x 2 + Carry value of 1 = 7
1 | 1 | ||||||
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 |
Show value = 7
New multiplication row:
Insert a 0 as our placeholder
Current result: 1 x 4 = 4
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
4 | 0 |
Show value = 4
Current result: 1 x 0 = 0
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
0 | 4 | 0 |
Show value = 0
Current result: 1 x 4 = 4
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
4 | 0 | 4 | 0 |
Show value = 4
Current result: 1 x 2 = 2
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 |
Show value = 2
Add up our results by column:
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 | |||
2 |
Adding up column 1, we get: 2 + 0
Our column sum becomes 2.
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 | |||
5 | 2 |
Adding up column 2, we get: 1 + 4
Our column sum becomes 5.
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 | |||
2 | 5 | 2 |
Adding up column 3, we get: 2 + 0
Our column sum becomes 2.
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 | |||
1 | 2 | 5 | 2 |
Adding up column 4, we get: 7 + 4
Our column sum becomes 11.
Since our sum is greater than 9, we will carry a 1 over for the next column sum.
2 | 4 | 0 | 4 | ||||
x | 1 | 3 | |||||
7 | 2 | 1 | 2 | ||||
2 | 4 | 0 | 4 | 0 | |||
3 | 1 | 2 | 5 | 2 |
Adding up column 5, we get: 2
Add carry value 1 to this column sum to get 3.