What does property mean when it comes to mathematics

In math, properties demonstrate general rules that are used in calculations. The most commonly used properties in day-to-day math are the properties of addition and multiplication. The commutative property of addition, for example, states that no matter how you order the numbers when adding, the result is the same.

Both 28 I think I just multiplied 7×4 and on the light side is still the same length so that means that is also 4 for A