A certain agricultural machinery factory produces 3 times more farm implements this year than last year, and produces 4140 pieces per month this year. How many more farm implements are produced each month this year than last year?
某农机厂今年每月生产的农具是去年的3倍，今年每月生产4140件，今年每月比去年每月多生产农具多少件？
<gadget id="calculator">4_140 / 3</gadget>
<output>1_380</output>

<gadget id="calculator">4_140 - 1_380</gadget>
<output>2_760</output>

<result>2_760</result>