You mainly have to see inside to know why this is important
Zeno came up with a paradox which basically states that someone who is moving will never get to their destination, because every time they move the distance to their distination is halved. They should never be able to get to their destination (such as the x = 40 coordinate for the object in this project), because there is always a smaller and smaller fraction between them and the destination. This theory is disprooven however by the fact that, at constant velocity, the time it takes the object to travel half the distance is also halved. Thus, the infinitly small cancels itself out. This can be expressed by saying (1/2 + 1/4 + 1/8 + 1/16... 1/(2^n))distance/(1/2 + 1/4 + 1/8 + 1/16... 1/(2^n))time = 1. The infinite sums cancel each other out.
