The two outer terms of a ratio are reciprocals of each other, one of the inner terms is 6, and the other inner term is how many.
一个比的两个外项互为倒数，其中一个内项是6，另外一个内项是多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>