URI Online Judge | 2170
# Taxes of Project

**Timelimit: 1**

By Igor Gomes, UEVA Brazil

In an investment project, whose initial capital value is **X**, yield after a period a **Y** value you want to know what this project interest rate. You want to know what the internal rate of return on investment, because that way you can check the percentage of interest.

There are several designs to be analyzed, and each project is given the initial capital contribution (1 < **X** < 10^{20}), and its return (**X** < **Y** < 10^{20}).

For each project show the amount of interest for each application. Show as the sample output.

Input Sample | Output Sample |

20000 35000 |
Projeto 1: Projeto 2: Projeto 3: |