15 tons (1/5) is equivalent to 12 tons.
15吨的(1/5)相当于12吨的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 12</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">15 * (1/60)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>