There is a wall clock that strikes 1 at one o'clock, 2 at 2 o'clock, 3 at 3 o'clock... 12 at 12 o'clock, 1 at each half o'clock. May I ask: How many times does this wall clock strike in one day and night?
有一个挂钟，一点钟敲1下，两点钟敲2下，三点钟敲3下…十二点钟敲12下，每个半点敲1下，请问：这个挂钟一昼夜共敲多少下？
<gadget id="calculator">1 + 12</gadget>
<output>13</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">13 * 6</gadget>
<output>78</output>

<gadget id="calculator">12 * 1</gadget>
<output>12</output>

<gadget id="calculator">78 + 12</gadget>
<output>90</output>

<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<result>180</result>