Example
4.21 x 5.3
Step 1
Multiply as whole numbers.
4.21
x 5 .3
1263
21050
22313
Step 2
Count the number of digits in the equation that are to the right of decimals.
4.21
x 5.3
There are 3 numbers in the equation to the right of decimals.
Step 3
Take the product from Step 1.
Use the sum found in Step 2 - count from the right and place the decimal.
22.313
The final answer is 22.313