At 4 o'clock in the morning, what is the smallest angle formed by the hour and minute hands?
零晨4点整时，时针和分针所夹的最小的角是多少．
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">6 * 20</gadget>
<output>120</output>

<result>120</result>