The former term of a ratio is (4/7), the ratio is 2, and what is the latter term.
一个比的前项是(4/7)，比值是2，后项是多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) / 2</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>