There is a ratio, the two inner terms are reciprocals of each other, one outer term is 3, and the other outer term is
有一个比例，两个内项互为倒数，一个外项是3，另一个外项是多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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