At 4 o'clock on the clock face, what is the angle between the hour and minute hands?
钟面上4时整时，时针与分针的夹角是多少°
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

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

<result>120</result>