Wang Xiaofang has a 30 cm wide rectangle of colored paper, she cuts out the largest square from this colored paper to make a small flag, and the area of the remaining colored paper is 360 square centimeters. What is the area of the original colored paper in square centimeters?
王晓芳有一张宽30厘米的长方形彩纸，她从这张彩纸上剪下一个最大的正方形做小旗，剩下彩纸的面积是360平方厘米．原来彩纸的面积是多少平方厘米？
<gadget id="calculator">360 / 30</gadget>
<output>12</output>

<gadget id="calculator">30 + 12</gadget>
<output>42</output>

<gadget id="calculator">42 * 30</gadget>
<output>1_260</output>

<result>1_260</result>