The original question was how to convert 19 miles to km.<p>First decompose it into a sum of Fibonacci numbers:<p><pre><code>        19 = 13 + 5 + 1
</code></pre>
Then find the next Fibonacci number for each one of them:<p><pre><code>        13 -&#62; 21
        5  -&#62; 8
        1  -&#62; 2
</code></pre>
Then sum them up to get the result in kilometers:<p><pre><code>        21 + 8 + 2 = 31km
</code></pre>
Which is within 1.36% of the correct answer (the correct answer is 30.57km.)