On the clock face, when the minute hand rotates once, how many degrees does the hour hand rotate?
钟面上，当分针旋转1周时，时针旋转多少度．
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>