The two internal terms of a ratio are reciprocals of each other, one external term is (1/8), and the other external term is how much.
一个比例的两个内项互为倒数，一个外项是(1/8)，另一个外项是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<result>8</result>