doesn't compile in 2024 - error: this arithmetic operation will overflow

[refacktor]

I've been looking for a simple archive utility that's free, fast, can handle multiple terabytes without crashing, works on Windows, uses a standard archive file format, and doesn't come loaded with adware. This rapidtar project seemed perfect. Unfortunately, I'm unable to get past cargo build:

error: this arithmetic operation will overflow
  --> librapidarchive\src\units\data.rs:82:80
   |
82 | ...from(1024 * 1024 * 1024 * 1024).unwrap())
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to compute `1073741824_i32 * 1024_i32`, which would overflow
   |
   = note: `#[deny(arithmetic_overflow)]` on by default

I did a bit of initial research and it looks like there were some changes in the handling of int overflow in Rust 2018. Maybe this just needs a cast to i64? I'll try to find some time to try a quick fix.