I'm glad it was mentioned recently, but just to make sure it's clear I will state it the way it's always been stated to me. Taking 20 literally means you roll a 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20..... that is why it takes *20* times as long because you are practicing the idea...