P2394 yyy loves Chemistry I

Once, there was a person named yyy who especially loved chemistry, especially some very dangerous ("zuo si") experiments. That day, he began to study a magical and interesting equation: $\text{2Na + 2H}_{2}\text{O == 2NaOH + H}_2\uparrow$

Now yyy puts a piece of sodium with mass $x\ \text{g}$ into a lot (excess) of water and then starts collecting hydrogen gas. In the end, we know that this piece of sodium swam around in the water and disappeared. And yyy is very capable and collected all the hydrogen gas. Known that every $\bm{23}$ grams of sodium added will produce $\bm1$ gram of hydrogen gas. How many grams of hydrogen did yyy collect? Formal statement: Given a real number $\bm x$, output $\bm{\frac{x}{23}}$ rounded to $\bm 8$ decimal places.

One line containing a real number $x$, representing the mass of sodium that yyy put into the water (unit: $\text{g}$). There will definitely not be a trailing newline at the end of the input file.

One line containing a real number (rounded to $8$ decimal places), representing how many grams of hydrogen gas were produced.

### Constraints and Notes For $100\%$ of the testdata, $0 < x \le 1$. ### Hint Do you want to know how many decimal places $x$ has? Not telling you >_< kkksc: How can there be no constraints! The input file is no more than $5\text M$! Problem setter: How could you do that! Bad review! Now I can't lay traps! ### Warning Please note that the experiment described in the problem is highly risky. Do not attempt it: the reactive metal $\bold{Na}$ poses safety hazards, $\bold{NaOH}$ is strongly corrosive, and dissolving $\bold{NaOH}$ in water releases a large amount of heat. Translated by ChatGPT 5