25% of 2 tons weighs the same as how many tons (5/7).
2吨的25%与多少吨的(5/7)一样重．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(1/4) / (5/7)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">2 * (7/20)</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>