For a cart of fruit, take away (1/3) of it on the first day and (1/6) of it on the second day, how much of this cart is left.
一车水果，第一天运走它的(1/3)，第二天运走它的(1/6)，还剩这车水果的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/3) - (1/6)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>