The Shanghai World Expo will be held from May 1st to October 31st, 2010. How many days in total?
上海世博会的举办时间为2010年5月1日～10月31日，共多少天．
<gadget id="calculator">31 * 4</gadget>
<output>124</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">124 + 60</gadget>
<output>184</output>

<result>184</result>