There used to be several tons of coal in the shop, half of the total was shipped out in the morning on the first day, and 5 tons in the afternoon; half of the remaining coal was shipped out in the morning on the second day, and 5 tons in the afternoon; Half of the remaining coal will be shipped out another 5 tons in the afternoon. At this time, the coal in the warehouse will be shipped out. How many tons of coal is there in this warehouse?
商店里原来有煤若干吨，第一天上午运出总数的一半，下午运出5吨；第二天上午运出剩下煤的一半，下午也运出5吨；第三天上午又运出剩下的煤的一半，下午再运出5吨，这时仓库里的煤正好运完，这个仓库原有煤多少吨？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 + 5</gadget>
<output>35</output>

<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<result>70</result>