The two inner terms of a ratio are reciprocals of each other, one of which is 0.6, and what is the other outer term.
在一个比例的两个内项互为倒数，其中一个外项是0.6，另一个外项是多少．
<gadget id="calculator">1 / 0.6</gadget>
<output>1.666667</output>

<result>1.666667</result>