There are 240 tons of coal in a pile, and (1/4) of it is removed for the first time, and (1/6) of it is removed for the second time, how many tons of coal are left?
一堆煤有240吨，第一次运走它的(1/4)，第二次运走它的(1/6)，还剩下煤多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/4) - (1/6)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">240 * (7/12)</gadget>
<output>140</output>

<result>140</result>