Mathematics is a great tool to understand and calculate with numbers. But mathematics is more than just numbers and equations. The world is full of interesting mathematical facts and properties, like the fact that two people that are farther apart look the same and that the distance between two people is proportional to the difference in their heights.

Calculating is not that hard. Try using this calculator and let it do all the work for you. And there are many ways to calculate. One of the easiest is to use the calculator to solve an equation, which is a very common method. The other way is to use the calculator to find the zeros of a function, which are the points where the function is equal to zero.