In a ratio, the two internal terms are reciprocals of each other, one of the external terms is (9/8), and the other external term is
在一个比例中，两个内项互为倒数，其中一个外项是(9/8)，另一个外项是多少
<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">1 / (9/8)</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>