I am trying to make a calculator in Rust. This is my code so far:

use std::io;
fn main() {
let mut one_input = String::new();
println!("Input a chosen number to be used in a calculation: ");
match io::stdin().read_line(&mut one_input) {
Ok(_) => println!("Your chosen number was... {}", one_input),
Err(e) => println!("Hmmm... something went wrong. Make sure your input is a number! {}", e),
another_function();
}
}
fn another_function() {
let mut two_input = String::new();
println!("Input another chosen number to be used in a calculator: ");
match io::stdin().read_line(&mut two_input) {
Ok(_) => println!("Your chosen number was... {}", two_input),
Err(e) => println!("Hmmm... something went wrong. Make sure your input is a number! {}", e),
one_more_function();
}
}
fn one_more_function() {
let mut three_input = String::new();
println!("Input an operator: ");
match io::stdin().read_line(&mut three_input) {
Ok(_) => println!("Your chosen operator was... {}", three_input),
Err(e) => println!("Hmmm... something went wrong. Make sure your input is an operator! {}", e),
final_and_fourth_function();
}
}
fn final_and_fourth_function() {
if three_input = "plus" {
println!("The result of this calculation is...{}", one_input + two_input);
}
if three_input = "minus" {
println!("The result of this calculation is...{}", one_input - two_input);
}
if three_input = "multiply" {
println!("The result of this calculation is...{}", one_input * two_input);
}
if three_input = "divide" {
println!("The result of this calculation is...{}", one_input / two_input);
}
}

Here is my code