A toy factory plans to produce 42,000 electric vehicles. It has been produced for 6 days, with an average daily production of 4,000 vehicles. The remaining requirements are completed in 4 days. How many thousands of cars are produced on average every day?
一个玩具厂计划生产4.2万辆电动汽车，已经生产了6天，平均每天生产0.4万辆，余下的要求4天完成．平均每天生产多少万辆？
<gadget id="calculator">0.4 * 6</gadget>
<output>2.4</output>

<gadget id="calculator">4.2 - 2.4</gadget>
<output>1.8</output>

<gadget id="calculator">1.8 / 4</gadget>
<output>0.45</output>

<result>0.45</result>