The former term of a ratio is (1/2) and the ratio is (2/5), what is the latter term of this ratio.
一个比的前项是(1/2)比值是(2/5)，这个比的后项是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) / (2/5)</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>