A wood factory needs to make 2,800 sets of furniture. It has been done for 12 days, and 50 sets are made every day. How many sets are left?
一个木工厂要做2800套家具，已经做了12天，每天做50套，还剩多少套没有做？
<gadget id="calculator">50 * 12</gadget>
<output>600</output>

<gadget id="calculator">2_800 - 600</gadget>
<output>2_200</output>

<result>2_200</result>