In the ratio, the two outer terms are the reciprocals of each other, one of the inner terms is 8, and the other inner term is how much.
在比例中两个外项互为倒数，其中一个内项是8，另一个内项是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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