Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .

Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .

Add the numbers in each column. In this case, add , then place the in the result line.

Add the numbers in each column. In this case, add , then place the in the result line.

The result of is .

Evaluate 21*2