> By scaling the numbers first by taking the log, multiplication becomes addition and addition becomes x + log1p(exp(y - x)). Addition/subtraction in a logarit

> By scaling the numbers first by taking the log, multiplication becomes addition and addition becomes x + log1p(exp(y - x)). Addition/subtraction in a logarithmic number system is way more expensive than what you would spend on multiplication, especially if you care about correctly rounded results, as the (hardware) LUTs required are rather big.