There are 1,250 people living in Shengda Community, which is 380 more than Mingyue Community. How many people live in the two communities?
圣达小区住着1250人，比明月小区多380人，两个小区一共住着多少人？
<gadget id="calculator">1_250 - 380</gadget>
<output>870</output>

<gadget id="calculator">870 + 1_250</gadget>
<output>2_120</output>

<result>2_120</result>