Function multiply

0a_error_handling/rust/nohandling.rs:1–5

(first_number_str: &str, second_number_str: &str)

fn multiply(first_number_str: &str, second_number_str: &str) -> i32 {
    let first_number = first_number_str.parse::<i32>().unwrap();
    let second_number = second_number_str.parse::<i32>().unwrap();
    first_number * second_number
}

fn main() {
    let twenty = multiply("10", "2");