A school-run factory originally planned to produce an average of 3,190 pencil cases per month last year, but the actual production completed the planned task for the whole year in 11 months. How many more stationery boxes are actually produced per month than the original plan?
某校办工厂去年原计划平均每月生产文具盒3190个，实际生产11个月就完成了全年的计划任务．实际比原计划平均每月多生产多少个文具盒？
<gadget id="calculator">12 / 11</gadget>
<output>12/11 = around 1.090909</output>

<gadget id="calculator">3_190 * (12/11)</gadget>
<output>3_480</output>

<gadget id="calculator">3_480 - 3_190</gadget>
<output>290</output>

<result>290</result>