The alarm clock at the bus station strikes once at one o'clock, twice at two o'clock, ..., 12 times at twelve o'clock, once every half hour, how many times in a day and night in total.
汽车站的报时钟一时敲一下，二时敲2下，…，十二时敲12下，每隔半小时敲一下，一昼夜共敲多少下．
<gadget id="calculator">1 + 12</gadget>
<output>13</output>

<gadget id="calculator">13 * 12</gadget>
<output>156</output>

<gadget id="calculator">156 / 2</gadget>
<output>78</output>

<gadget id="calculator">2 * 78</gadget>
<output>156</output>

<gadget id="calculator">156 + 24</gadget>
<output>180</output>

<result>180</result>