Calculator inside trade window

[MurkyPuddleIsMyIGN 3]

Alright guys so be honest how many times have you been inside a trade window and had to alt-tab to go to your calculator to do math?

 

How many times has someone else closed out of a trade window because you had to go do some math and they were just so impatient?

 

 This guy and I were talking the other day and I told him I said hey what if I created a calculator that could be in the trade window and he was so excited and I felt the same way. I don't know why RuneScape doesn't do this.

[Numerous One 98]

Maybe it just hasn't been thought of yet or RS just doesn't see the need and claims it being "too lazy" to have one built in.