👉 The term "reversal" is a concept in mathematics that refers to the operation of changing one number (the "input") into another number (the "output"). In other words, it involves swapping or exchanging parts of a number. This can be done by using addition, subtraction, multiplication, division, or any combination thereof. For example, if we have two numbers, \(a\) and \(b\), and we want to find their product, we would first add the numbers together