Hello, my calculator (sharp el-w516) can generate random fractions like 237/431. I was curious if there was a way to do this by hand. I would like to be able to roll any sided die by multiplying the random fraction by the side number. For example if I wanted to roll a d20 I could take the fraction and multiply by 20 and round to nearest to simulate a dice roll. I vaguely understand how random numbers are generated using properties of electronics so maybe its impossible to do solely by hand. I was just wondering if there was a way to do it without even tables or anything.