The Southeast Automobile Factory needs to install 3,000 cars, 750 of which have already been installed, and the rest will be installed in 9 days. How many cars are installed on average per day?
东南汽车厂要装3000辆小汽车，已经装了750辆，剩下要在9天装完，平均每天安装多少辆？
<gadget id="calculator">3_000 - 750</gadget>
<output>2_250</output>

<gadget id="calculator">2_250 / 9</gadget>
<output>250</output>

<result>250</result>