The school uniform factory needs to produce a batch of school uniforms. It has already produced 1,400 sets, and the remaining 60 sets are produced every day. It will take 12 days to complete. How many sets of this batch of school uniforms are there?
校服厂要生产一批校服，已经生产了1400套，剩下的每天生产60套，还需要12天才能完成，这批校服共多少套？
<gadget id="calculator">60 * 12</gadget>
<output>720</output>

<gadget id="calculator">1_400 + 720</gadget>
<output>2_120</output>

<result>2_120</result>