Excuse me, how do you calculate the Lohan in Baoguang Temple?

You choose a statue in it (it's best not to choose one with a window behind it. It is said that none of the people by the window are arhats). Men count to the left and women count to the right (including the statue you choose when you count). If you turn around, if your nominal age is 20, count to 20 (substitute nominal age for real age) and write down the number and name of the statue.