workshop originally planned to burn 1,200 tons of coal in 12 days, but actually burned 20 tons more than the original plan every day. How many days did this pile of coal actually burn?
某车间原计划12天烧煤1200吨，实际每天比原计划多烧20吨，这堆煤实际烧了多少天？
<gadget id="calculator">1_200 / 12</gadget>
<output>100</output>

<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">1_200 / 120</gadget>
<output>10</output>

<result>10</result>