In a ratio, the two internal terms are reciprocals of each other, one of the external terms is (8/3), and the other is how much.
在一个比例中，两个内项互为倒数，其中一个外项是(8/3)，另一项是多少．
<gadget id="calculator">8 / 3</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">1 / (8/3)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>