In a ratio, it is known that the two outer terms are reciprocals of each other, one of the inner terms is 3, and the other inner term is how much.
在一个比例里，已知两个外项互为倒数，其中一个内项是3，另一个内项是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>