 # Decimals Module

In this exercise, we used the `decimal` module’s `Decimal` data type to control how many decimal places a number has after two numbers are added/multiplied together. Here is the code I used for this exercise:

``````# Import Decimal below:
from decimal import Decimal

# Fix the floating point math below:
two_decimal_points = Decimal('0.2') + Decimal('0.69')
print(two_decimal_points)

four_decimal_points = Decimal('0.53') * Decimal('0.65')
print(four_decimal_points)
``````

I don’t understand how using `Decimal` in the `two_decimal_points` expression results in a float with two decimal places, while the `four_decimal_points` expression results in a float four decimal places. It appears as though we’re doing the same thing to both expressions, so how are they resulting in different decimal places??

decimal behaves like beginners sometimes mistakenly expect float to behave.
so if you do that multiplication yourself as if it was in a grade school math book, how many decimals do you get?

also see the Decimal module documentation which mentions this

2 Likes

@ionatan got it, thanks!