In a ratio, the two outer terms are reciprocals of each other, one inner term is 1.25, and the other inner term is 1.25.
在一个比例中，两个外项互为倒数，一个内项是1.25，另一个内项是多少．
<gadget id="calculator">1 / 1.25</gadget>
<output>0.8</output>

<result>0.8</result>