In the ratio, the two outer terms are reciprocals of each other, one of the inner terms is (5/8), and the other inner term is how much.
在比例中，两个外项互为倒数，其中一个内项是(5/8)，另一个内项是多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / (5/8)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>