Non-whole number calculations

# Problem Description

Some calculations of two whole numbers may result in a decimal, such as division.

# Desired Behavior

When dividing two numbers, produce a result as a decimal number, such as `5/2` should produce `2.5` rather than `2`

Search the project for the calculation or division logic and reproduce the reported 5/2 case. Update the relevant behavior so division of whole numbers preserves a decimal result, then verify that 5/2 produces 2.5 and that existing calculation behavior still works.

Written by the indexing model from the issue text.