In a ratio, the product of two inner terms is 2, one of the outer terms is (5/2), and what is the other outer term.
在一个比例中，两个内项的积是2，其中一个外项是(5/2)，另一个外项是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">2 / (5/2)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>