There is a pile of coal, and it was the first time to pull away one of them (5/11). If another 30 tons are pulled away, then the number of tons removed is more than the rest (1/5). How many tons of coal are there in total?
现有一堆煤，第一次拉走了其中的(5/11)．如果再拉走30吨，那么拉走的吨数比剩下的多(1/5)，问一共有多少吨煤？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(6/11) - (5/11)</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">30 / (1/11)</gadget>
<output>330</output>

<result>330</result>