how many digits are in ( 8 × 10 ^ 8 ) ( 10 × 10 ^ 10 ) ?
"the question simplfies to ( 8 × 10 ^ 8 ) ( 10 ^ 11 ) = > 8 * 10 ^ 19 = > will contain 19 zeros + 1 digit 8 = > 20 ans a"
add(10, add(const_3, const_4))