When the clock shows 6:30, what is the smaller angle formed by the hour and minute hands?
当时钟显示6：30，时针与分针所组成的较小的角是多少．
<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">6 * (5/2)</gadget>
<output>15</output>

<result>15</result>