Xinyue Lighting produced 2680 light tubes in January, 250 less in February than January, and 730 more in March than January. In the first quarter, Xinyue Lighting Factory produced an average number of fluorescent tubes per month.
新粤灯具长一月份生产2680支光管，二月份比一月份少生产250支，三月份比一月份多生产730支．新粤灯具厂一季度平均每个月生产光管多少支．
<gadget id="calculator">2_680 - 250</gadget>
<output>2_430</output>

<gadget id="calculator">2_680 + 730</gadget>
<output>3_410</output>

<gadget id="calculator">2_680 + 2_430 + 3_410</gadget>
<output>8_520</output>

<gadget id="calculator">8_520 / 3</gadget>
<output>2_840</output>

<result>2_840</result>