how many digits are in ( 8 × 10 ^ 18 ) ( 10 × 10 ^ 10 ) ?
"the question simplfies to ( 8 × 10 ^ 18 ) ( 10 ^ 11 ) = > 8 * 10 ^ 29 = > will contain 29 zeros + 1 digit 8 = > 30 ans e"
add(10, add(const_3, const_4))