In the 2010 Shanghai World Expo, the planned land area of the World Expo Park was 5.28 million square meters. In 1992, the World Expo held by the Spanish government in Seville covered an area of 4.78 million square meters. How many thousand square meters does the Shanghai World Expo cover compared with the Villa World Expo?
2010年上海世博会上，世博园规划用地范围是528万平方米，1992年西班牙政府在赛维利亚举办的世博会占地面积是478万平方米．上海世博会比赛维利亚世博会占地面积多多少万平方米？
<gadget id="calculator">528 - 478</gadget>
<output>50</output>

<result>50</result>