company wants to produce 540,000 mobile phones. In the first 10 days, it will produce 15,000 units per day on average, and the rest will be completed within 13 days. How many thousands of mobile phones will it produce on average per day?
某公司要生产手机54万部，前10天平均每天生产1.5万部余下的要在13天内完成，平均每天生产手机多少万部？
<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<gadget id="calculator">54 - 15</gadget>
<output>39</output>

<gadget id="calculator">39 / 13</gadget>
<output>3</output>

<result>3</result>