(2/5) of a pile of coal is (3/5) tons, how many tons does this pile of coal have?
一堆煤的(2/5)是(3/5)吨，这堆煤有多少吨．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) / (2/5)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>