True story. Some years back, I was having trouble sleeping and decided I was getting too much light in the mornings. So I measured my bedroom windows, which were all different, odd widths, and went to Lowe's where they sell nicely opaque vinyl blinds. So I pick out the blinds I want, and go to the cutting machine and press the button to summon store help. The cutting machine turned the blinds, which were cut by a blade which screw clamps to a metal bar marked off like a ruler. There were no detents or slots, so any width could be cut by simply moving the blade to the right measurement. Well, a young woman comes along wearing one of the store vests and I tell her I need blinds cut and show her my measurements. She looks at them and looks me straight in the eyes and tells me, "The machine doesn't do fractions."

I almost fell over.