Exercise: explicit conversions

Now, use what you learn about doing x as f64 to fix the following program:

#![allow(unused)]
fn main() {
let x = 4
let y = 2.0;
let z = x / y;
dbg!(z);
}

We could solve in two directions:

#![allow(unused)]
fn main() {
let x = 4
let y = 2.0;
let z = x as f64 / y;
dbg!(z);
}

Or:

#![allow(unused)]
fn main() {
let x = 4
let y = 2.0;
let z = x / y as i64;
dbg!(z);
}