# Evaluate 17*21 17⋅21
Multiply using long multiplication.
Multiply 1 by 7. Place the result in the next column in the result line. There is one result line for each digit in 21.
 1 7 ⨯ 2 1 7
Multiply 1 by 1. Place the result in the next column in the result line. There is one result line for each digit in 21.
 1 7 ⨯ 2 1 1 7
Multiply 2 by 7. Place the ones digit (4) in the result line and carry the tens digit (1). There is one result line for each digit in 21.
 1 1 7 ⨯ 2 1 1 7 4
Multiply 2 by 1 and add the carried 1. Place the result in the next column in the result line. There is one result line for each digit in 21.
 1 7 ⨯ 2 1 1 7 3 4
Add the numbers in each column. In this case, add 7+0, then place the 7 in the result line.
 1 7 ⨯ 2 1 1 7 3 4 7
Add the numbers in each column. In this case, add 1+4, then place the 5 in the result line.
 1 7 ⨯ 2 1 1 7 3 4 5 7
Add the numbers in each column. In this case, add 0+3, then place the 3 in the result line.
 1 7 ⨯ 2 1 1 7 3 4 3 5 7
 1 7 ⨯ 2 1 1 7 3 4 3 5 7
The result of 17⋅21 is 357.
357
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