The construction area of the Bird's Nest, the main venue of the 29th Beijing Olympic Games, is 25.8 hectares, which is 18.2 hectares smaller than the construction area of Tiananmen Square. How big is the construction area of Tiananmen Square?
第29届北京奥运会的主会场-鸟巢建筑面积是25.8公顷，比天安门广场建筑面积小18.2公顷，天安门广场的建筑面积有多大？
<gadget id="calculator">25.8 + 18.2</gadget>
<output>44</output>

<result>44</result>