The TV factory produced an average of 1,620 TVs per quarter in the first three quarters of last year, and an average of 1,780 TVs per quarter in the last three quarters. It is known that 1590 TV sets were produced in the first quarter, how many TV sets were produced in the fourth quarter?
电视机厂去年前三个季度平均每季度生产电视机1620台，后三个季度平均每季度生产电视机1780台．已知第一季度生产了1590台，第四季度生产电视机多少台？
<gadget id="calculator">1_780 * 3</gadget>
<output>5_340</output>

<gadget id="calculator">1_620 * 3</gadget>
<output>4_860</output>

<gadget id="calculator">4_860 - 1_590</gadget>
<output>3_270</output>

<gadget id="calculator">5_340 - 3_270</gadget>
<output>2_070</output>

<result>2_070</result>