Mathematicians and other practitioners of the Exact Sciences (like logic design) like to sneer at the Inexact Sciences, like chemistry and physics. Before calculators became common, practitioners of the Inexact Sciences often multiplied using logarithm tables, because they were more accurate than slide rules.
Here's the joke:
Two chemists need to multiply 2 times 3. One of them says: "OK, let's take the log of 2... and the log of 3... add them... take the anti-log... let's see... we get 5.99... well, call it 6."