Dynamic table in smartforms depending on the number of selected elements on selection screen

Hey all,

I have a selection screen where I choose the number of table cells. According to this number of table cells I want to make a table in smartforms with 2 colums and the number of rows depends on the selected number of cells. If the number of table cells is odd the last row should contain only one column, but all rows should have the same width.

For example if we would choose the number of cells 4 then we need to draw a table like this:

In case of number of cells 5 we would need to draw a table like this:

How could I achieve this? Please help me I am a beginner with smartforms.

Regards,
Robert