The product of two inner terms of a ratio is 1, one of the outer terms (5/8), what is the other outer term.
一个比例的两内项之积是1，其中一个外项(5/8)，另一个外项是多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / (5/8)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>