246 - 13 = 18.923076
Looks like American Express is sending out a fascinating little calculator as a promotional item. I haven’t seen one myself, but here are some of the results, as reported by Contentious: 100 - 10 = 10 7.1 + 3.4 = 24.14 144.35 + 525 = 75,783.75 246 - 13 = 18.923076