I faced the same problem while trying to solve with elixir. It turns out that the precision of floats in elixir and erlang cannot handle the size of the input.

Source: https://github.com/elixir-lang/elixir/issues/2872

Elixir:

234002979492340039680```

Ruby:

```irb(main):001:0> 2340029794923400297949 / 10
=> 234002979492340029794```

As you can see the result of `x` is different.