The Shanghai World Expo will open on May 1 and close on October 31. How many days in total?
上海世博会5月1日开幕，10月31日闭幕．一共多少天？
<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>