How to do math functions

[samlol]

I was wondering how I can add or subtract a variable from a given number.

My script gets a number from a website using the "get text" option. I want to take that number and subtract it from a given value.

For example I tried making a variable, using the set variable option.

[[Number to use]] = 20 - [[number extracted from website]]
However this doesn't work so could somebody point me in the right direction. Thanks

Edit: I found the solution, just had to change the variable type to an "expression" instead of a string.

[vitsh1974]

use expresion like [[number extracted from website]] -> to digital

or JS fn