The TV factory needs to produce 120 TVs. It has been producing 6 days, and there are still 30 TVs left. How many TVs are produced on average per day?
电视机厂要生产120台电视机，已经生产了6天，还差30台，平均每天生产多少台？
<gadget id="calculator">120 - 30</gadget>
<output>90</output>

<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<result>15</result>