At 8:30, what is the angle between the hour and minute hands on the clock?
在8：30时，时钟上的时针与分针之间夹角为多少゜
<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">30 * 2.5</gadget>
<output>75</output>

<result>75</result>