In a ratio, the two outer terms are reciprocals, one inner term is 0.8, and the other inner term is 0.8.
在一个比例中，两个外项互为倒数，其中一个内项是0.8，另一个内项是多少．
<gadget id="calculator">1 / 0.8</gadget>
<output>1.25</output>

<result>1.25</result>