There is a pile of coal, half of which was transported away in the first time, and 52 tons were transported away in the second time. At this time, there are still 36 tons left. How many tons is this pile of coal originally?
有一堆煤，第一次运走一半，第二次又运走52吨，这时还剩下36吨，这堆煤原有多少吨？
<gadget id="calculator">52 + 36</gadget>
<output>88</output>

<gadget id="calculator">88 * 2</gadget>
<output>176</output>

<result>176</result>