The school playground is 80 meters long and 55 meters wide. After reconstruction, the length and width have increased by 15 meters respectively. How many square meters has the area increased?
学校操场长80米、宽55米，改建后长和宽分别增加了15米，面积增加了多少平方米？
<gadget id="calculator">80 + 15</gadget>
<output>95</output>

<gadget id="calculator">55 + 15</gadget>
<output>70</output>

<gadget id="calculator">95 * 70</gadget>
<output>6_650</output>

<gadget id="calculator">80 * 55</gadget>
<output>4_400</output>

<gadget id="calculator">6_650 - 4_400</gadget>
<output>2_250</output>

<result>2_250</result>