ant
</code></pre>
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This error lets you know that Rust has this constant defined more precisely and
that your program would be more correct if you used the constant instead. You
would then change your code to use the `PI` constant. The following code
doesn’t result in any errors or warnings from Clippy:
-->
<p>あなたは、このエラーのおかげで、Rustにはより正確に定義された定数がすでにあり、これを代わりに使うとプログラムがより正しくなるかもし�