How to apply conditional formating on cells

Hi, I have above table and I want to apply conditional formating on colomun mentioned "R" so if the value in "R" Colomun comes in between the "risk rating" table on the above it should change the color of the cell automatically.
I have already applied the "prodcutx" formula to calculate the value which is S x L = R.
Need community's support in it !

