How many degrees does the hour hand rotate when the minute hand on the clock face rotates 720°?
钟面上分针旋转720°时，时针旋转了多少度？
<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">720 / 360</gadget>
<output>2</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>