how many integers between 263,205 and 658,805 have tens digit 1 and units digit 3 ?
"there is one number in hundred with 1 in the tens digit and 3 in the units digit : 13 , 113 , 213 , 313 , . . . the difference between 263,205 and is 658,805 - 263205 = 395,600 - one number per each hundred gives 133,900 / 100 = 3,956 answer : c ."
subtract(658,805, add(add(multiply(const_2, const_100), multiply(add(const_3, const_4), const_10)), const_2))