Specific Find Followed By Equation Applied And Outputted To A New Column

I have the data sheet, which is the result of another function. It produces 10 columns with numbers in each cell, there can be any number of rows, but the key is that the rows are outlined as follows. The first row has the first column number bolded, followed by the second row not bolded and then a space and a repeat of the bold cell, followed by the non bold cell. Each row fills up all ten columns. I have attached an example of the sheet.

What I would like to do is create a function which says brings up a box that says "Input Row" and the user would input the bolded number of a row. From here the code would take that value entered and divide it by the inputted bolded number’s adjacent cell, to the right, aka B2 column. This value would then be multiplied by every other bolded rows second cell, B2 column, essentially giving rise to a normalization of that column. The output would then be displayed in a new column, column 11 in italics. Each row would now have its italics value corresponding to the bolded number’s row and not the other rows.