it's not a joke. writing a program in fractran to multiply input fractions that are part of the input data is no easier than writing a program in other turing-tarpit esolangs with no built-in arithmetic support, like the λ-calculus. try it. or check out https://stackoverflow.com/questions/1749905/code-golf-fractr... which has a couple of unusably inefficient fractran interpreters in fractran