A workshop produces 2,200 parts this month, which is 10% more than last month. How many parts were produced last month?
某车间本月生产零件2200个，比上月超产10%，上月生产零件多少个？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">2_200 / (11/10)</gadget>
<output>2_000</output>

<result>2_000</result>