The school starts on February 17, 2014 and has a holiday on June 30. How many days are there in this semester?
2014年2月17日开学，6月30日放假，这学期共有多少天．
<gadget id="calculator">28 - 17</gadget>
<output>11</output>

<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<gadget id="calculator">12 + 31 + 30 + 31 + 30</gadget>
<output>134</output>

<result>134</result>