Multiplication of Decimal Numbers
Decimal numbers are multiplied similar to whole numbers. When multiplying decimal numbers, there is no need to align decimal points.
The multiplication should be performed as if the decimal points were not present. However, it is necessary to add the decimal point to the proper place within the resulting product.
The decimal point in the product should be indented from the right equal to the total number of decimal places in the numbers being multiplied.
Example:
2.2
x 3.1
22
+ 660
6.82
x 3.1
22
+ 660
6.82
In
the example above, each factor contained one decimal place. Therefore,
the decimal point within the resulting product was idented two spaces
from the right.