A chemical fertilizer factory wants to produce a batch of fertilizers. It has been producing 12 days, with an average daily production of 25 tons, and there are 108 tons left. How many tons should it produce in total?
某化肥厂要生产一批化肥，已经生产了12天，平均每天生产25吨，还剩108吨，一共要生产多少吨？
<gadget id="calculator">25 * 12</gadget>
<output>300</output>

<gadget id="calculator">300 + 108</gadget>
<output>408</output>

<result>408</result>