Basic calculator with details of the resolution of the operations, for example, you know that 2 + 2/2 = 3, because if we are not alert we could assume that the result is 2, this calculator will show you the order of the operations that are performing, In this case first make the division 2/2 = 1 and then the sum 2 + 1 = 3, it will leave a detail as follows: 2/2 = 1. 0. 2 + 1.