A chemical factory originally planned to complete a production task in 16 days. Because it produced 3.6 tons of chemical raw materials per day, it ended up completing the production task in 12 days. How many tons of chemical raw materials were originally planned to be produced per day?
一个化工厂原计划16天完成一项生产任务，由于每天多生产化工原料3.6吨，结果12天就完成了生产任务，原计划每天生产化工原料多少吨？
<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3.6 * 3</gadget>
<output>10.8</output>

<result>10.8</result>