A pile of coal, (1/3) is removed for the first time, 70 tons are removed for the second time, and the total (3/8) is left. How many tons is the pile of coal?
一堆煤，第一次运走(1/3)，第二次运走70吨，还剩总数的(3/8)，这堆煤原有多少吨．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/3) - (3/8)</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">70 / (7/24)</gadget>
<output>240</output>

<result>240</result>