Ok so school blocked running stuff from files, so here's a temporary solution:

Ok, I'll make this look nice later but im lazy

Go to here:

And download the zip file.

Once you have it downloaded, open the zip (double click) and navigate until you find a file called "index.html".

Once you find said file, double tap it and wowe free gn-math wow!!!1111

Make sure you download the entire zip file and not just the index.html!