In a ratio, the two inner terms are reciprocals of each other, one outer term is 6, and the other outer term is how much.
一个比例中，两个内项互为倒数，一个外项是6，另一个外项是多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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