In a ratio, the product of two inner terms is the reciprocal of 5, one of which is (3/5), and what is the other outer term.
一个比例里，两个内项的积是5的倒数，其中一个外项是(3/5)，另一个外项是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5 / (3/5)</gadget>
<output>1/3 = around 0.333333</output>

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