When the time is 8:30, what is the angle formed by the hour and minute hands?
时间为8：30时，时针和分针所成的夹角是多少．
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">5 / 60</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 30</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) + 10</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">6 * (25/2)</gadget>
<output>75</output>

<result>75</result>