The chemical fertilizer factory plans to produce 5,890 tons of fertilizer this year, and the average monthly production in the first five months is only 450 tons. How many tons can be produced on average in the remaining months to complete the annual plan?
化肥厂今年计划生产化肥5890吨，头5个月平均每月只生产450吨，余下的几个月平均每月生产多少吨才能完成全年计划？
<gadget id="calculator">450 * 5</gadget>
<output>2_250</output>

<gadget id="calculator">5_890 - 2_250</gadget>
<output>3_640</output>

<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<gadget id="calculator">3_640 / 7</gadget>
<output>520</output>

<result>520</result>