The hour hand of a clock points to 1 and the minute hand points to 12 o'clock. What is the angle between the minute hand and the hour hand?
钟表的时针指向1，分针指向12时，这时分针和时针的夹角的度数是多少度．
<gadget id="calculator">1 * 30</gadget>
<output>30</output>

<result>30</result>