The 41st World Expo will open in Shanghai on May 1, 2010. In the 2005 Aichi World Expo in Japan, 121 countries will participate, which is 7 times more than (1/2) times the number of countries that have signed up for the Shanghai World Expo. How many countries have there been? countries to participate in the Shanghai World Expo?
2010年5月1日第41届世博会将在上海开幕，2005年日本爱知世博会有121个国家参加，比目前报名参加上海世博会国家数的(1/2)倍多7个，目前已有多少个国家参加上海世博会？
<gadget id="calculator">121 - 7</gadget>
<output>114</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">114 / (1/2)</gadget>
<output>228</output>

<result>228</result>