The cafeteria prepared a batch of coal. It was originally planned to burn 0.7 tons per day, but actually burned 0.1 tons more than the original plan per day, which was 2 days less than the original plan. How many tons of coal are there in total?
食堂准备了一批煤，原计划每天烧0.7吨，实际每天比原计划多烧了0.1吨，这样比原计划少烧了2天．这批煤一共有多少吨？
<gadget id="calculator">2 / 0.1</gadget>
<output>20</output>

<gadget id="calculator">0.7 + 0.1</gadget>
<output>0.8</output>

<gadget id="calculator">0.7 * 20 * 0.8</gadget>
<output>11.2</output>

<result>11.2</result>