In a ratio, the two outer terms are reciprocals of each other, one of the inner terms is (5/4), and the other inner term is
在一个比例中，两个外项互为倒数，其中一个内项是(5/4)，另一个内项是多少
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 / (5/4)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>