On the clock face, at 3:30, what is the smallest angle between the minute hand and the hour hand?
在钟面上，3：30的时候，分针和时针所夹的最小角是多少．
<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">15 - (5/2)</gadget>
<output>25/2 = around 12.5</output>

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

<result>75</result>