In the ratio, the two outer terms are reciprocals of each other, one of the inner terms is (5/6), 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(5/6)，另一个内项是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / (5/6)</gadget>
<output>6/5 = around 1.2</output>

<result>6/5 = around 1.2</result>