what is the sum of all digits for the number 10 ^ 28 - 44 ?
"10 ^ 28 is a 29 - digit number : 1 followed by 28 zeros . 10 ^ 28 - 44 is a 28 - digit number : 26 9 ' s and 56 at the end . the sum of the digits is 26 * 9 + 5 + 6 = 245 . the answer is b ."
multiply(add(divide(subtract(subtract(28, 10), const_2), const_2), 10), divide(add(subtract(28, 10), const_2), const_2))