Cell size not working

HTML & CSS
1 
http://antid2.cypherskateboarding.com/calc/

just testing out some things and i can’t quite get it how i want…and i don’t normally use tables so i have no clue on what to do…but the equals button needs to be 2 cells tall, and the 0 button needs to be 2 cells long heres the mock-up design:

the rest to match up i can do later on, just trying to get a base-layout finished.

2

If you apply rowspan=“2” to the ÷ cell, it will span two rows. E.g:

<td rowspan="2"></td>