[Tool] Hours till level calculator

Hi,

Build a tool that allows the user to calculate the amount of hours it would take to reach their desired

Motivation
Two reasons:

• It could be for example useful to players that sell leech to calculate their prices. For example if they sell a package for 75-85 and they know that they will average 7.000.000 experience per hour, they now know it will take them about 4,5 hours to do this.
  
• Being a bit of a nerd with hundreds of excel sheets, I want to slowly turn them all into web apps. I feel that would be more useful to the community if they were wondering the same.

Furthermore
I will be working on more applications such as a break-even base int for MP washing calculator. Not sure when. Anyhow, for suggestions or ideas feel free to let me know.

Spoiler: example

Enjoy!
[CALCULATOR]