How many degrees does the hour hand rotate from 1:00 pm to 5:00 pm on the clock face?
钟面上时针从下午1点走到下午5点，时针旋转了多少度．
<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">4 * 30</gadget>
<output>120</output>

<result>120</result>