You can also use the Fibonacci sequence: km&#x2F;miles = phi (within 0.5%), and the limiting ratio of sequential terms of the Fibonacci sequence is phi.<p>1 1 2 3 5 8 13 21 34<p><pre><code>    3 miles = 4.828 km
    5 miles = 8.047 km
    21 miles = 33.796 km</code></pre>