3 tons (1/5) is equal to 5 tons.
3吨的(1/5)和5吨的多少相等．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 5</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">3 * (1/25)</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>