Ion-column item above 2 rows

I have a grid with 12 rows and 12 columns each row.
but the last column should go over 2 rows. is it possible to do without flexboxes (anyway flexboxes just worked in browser for me).

it would also be ok for me, if there is a possibility to make the grid just about 80 percent of the page and make another grid on the 20 percent. But i have no idea how to do…

found the solution. just making 2 grids, 80 and 20 percent, floating one right.