A pile of coal weighs (1/2) tons, and (1/3) of it is removed, how many tons are removed.
一堆煤重(1/2)吨，运走了它的(1/3)，运走多少吨．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) * (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>