Well, for mental math 1000 inches ~ 1200 inches (100 ft). Or converting to meters: 100 ft / 3 = 33 yards ~ 33 meters. Since we added 20% in the first place (1

Well, for mental math 1000 inches ~ 1200 inches (100 ft). Or converting to meters: 100 ft / 3 = 33 yards ~ 33 meters. Since we added 20% in the first place (1200 vs 1000), 33 - 20% = 27m is better estimate (actual = 25m).