# Calculating the GCD
You can also [browse this source code online][code] and clone the wasmtime
repository to run the example locally.
[code]: https://github.com/bytecodealliance/wasmtime/blob/main/examples/gcd.rs
This example shows off how run a wasm program which calculates the GCD of two
numbers.
## `gcd.wat`
```wat
{{#include ../examples/gcd.wat}}
```
## `gcd.rs`
```rust,ignore
{{#include ../examples/gcd.rs}}
```