A rectangular swimming pool is 30 meters long and 26 meters wide. When it is expanded, its length increases by 8 meters and its width increases by 9 meters. How much does its area increase?
一个长方形游泳池，长30米，宽26米，扩建时，长增加8米，宽增加9米，它的面积增加了多少？
<gadget id="calculator">30 + 8</gadget>
<output>38</output>

<gadget id="calculator">26 + 9</gadget>
<output>35</output>

<gadget id="calculator">38 * 35</gadget>
<output>1_330</output>

<gadget id="calculator">30 * 26</gadget>
<output>780</output>

<gadget id="calculator">1_330 - 780</gadget>
<output>550</output>

<result>550</result>