How to retrieve value from the table with other table's data and parameter

Hi,

when I use the real number, I can retrieve the values.

スクリーンショット 2020-07-30 16.37.241018×599 34.9 KB

This is what I want.

But when I set like below,

スクリーンショット 2020-07-30 16.38.461019×598 38.6 KB

I can’t get what I want like above. where did I do wrong?

Thanks