Logarithms allow approximately multiplying numbers with several significant figures. This method compresses exact single-digit multiplication into three exact l

Logarithms allow approximately multiplying numbers with several significant figures. This method compresses exact single-digit multiplication into three exact lookups (with log tables you would instead look for nearby entries) and one addition. Also unlike logarithms, the intermediate integers are quite meaningless. They are a bit like logarithms but severely fiddled with.