Rounding to nearest integer in Custom Column - Hijri Year

Hello,

I have a column for the year the book was written in the Gregorian calendar, and also another column for the year in the Hijri Lunar calendar

I called the first column gyear, and the second column hyear. they are related by the simple formula hyear = (33/32)*(gyear - 622)

So made a column built from other columns, and called it hyear and gave it the following template,

and it works fine, except the result is a float with 4 decimal places, and I want to round it to the nearest integer. I tried

to do this but it does not work, it simply shows blank.

Please let me know how to do this, I am sure it is a very simple feature I simply overlooked.

Thanks