The two outer terms of a ratio are reciprocals of each other, if one of the inner terms is 1.5, what is the other inner term.
一个比例的两个外项互为倒数，如果其中一个内项为1.5，另一个内项是多少．
<gadget id="calculator">1 / 1.5</gadget>
<output>0.666667</output>

<result>0.666667</result>