The two internal terms of a ratio are reciprocals of each other, one of the external terms is 8, and the other external term is how many.
一个比例的两个内项互为倒数，其中一个外项是8，另一个外项是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>