Question 239324
Should be:


1 to 9 = 9 - 1 + 1 = 8 + 1 = 9 * 1 digit = 9
10 to 99 = 99 - 10 + 1 = 89 + 1 = 90 * 2 digits = 180
100 to 728 = 728 - 100 + 1 = 628 + 1 = 629 * 3 digits = 1887


total = 9 + 180 + 1887 = 2076


As far as I can tell.