A pile of coal is 204 tons. After 120 tons are used, the rest will burn 42 tons per day. How many more days can it burn?
一堆煤204吨，用去120吨后，剩下的每天烧42吨，还可以烧多少天？
<gadget id="calculator">204 - 120</gadget>
<output>84</output>

<gadget id="calculator">84 / 42</gadget>
<output>2</output>

<result>2</result>