The time on the clock face is 12 o'clock, if the hour hand is rotated 120° clockwise around the center, what time is it?
钟面上的时刻是12时，如果把时针绕着中心顺时针旋转120°，是多少时．
<gadget id="calculator">120 / 30</gadget>
<output>4</output>

<result>4</result>