so lemme see if ive got this right..you take the first number and draw the line across, so the one red line and the 3 blue (both horiz) represent the number 13..so you do the same with the two but make it vertical..then you segment it up with that funky ass percentage sign looking thing and you count how many times the lines cross over in each section? so in the top left there's One cross over, in the middle section, there is 5 cross overs and then in the bottom right there is six cross overs? so then you just right them into the right order et voila; 156.
May I?
You start by multiplying the number of bars in the bottom right circle (3*2=6)
Then you add the multiplied numbers of lines in the middle circle-ish thingy (2*1+3*1=5)
Finally you multiply the two number of lines in the top left circle (1*1=1)
and you get 156
Amma right?