How many days are there in the first half of 2013?
2013年的上半年有多少天．
<gadget id="calculator">31 * 3</gadget>
<output>93</output>

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

<gadget id="calculator">93 + 60 + 28</gadget>
<output>181</output>

<result>181</result>