How to multiply. college booklet, circa 1976, cover illustration by J. Goolsby. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to share on Pinterest (Opens in new window) Pinterest Click to share on Tumblr (Opens in new window) Tumblr Click to email a link to a friend (Opens in new window) Email Like Loading... May 4, 2018