10 tons increase its (1/5), which is how many tons
10吨增加它的(1/5)，也就是增加了多少吨
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * (1/5)</gadget>
<output>2</output>

<result>2</result>