how many integers between 324,700 and 418,600 have tens digit 1 and units digit 3 ?
"the integers are : 324,713 324,813 etc . . . 418,513 the number of integers is 4186 - 3247 = 939 the answer is c ."
subtract(418,600, add(add(multiply(const_2, const_100), multiply(add(const_3, const_4), const_10)), const_2))