At 6:20, the minute hand points to 4, and after a few minutes, the two hands coincide.
6时20分时，分针指向4，再过多少分钟，两针重合．
<gadget id="calculator">140 / 11</gadget>
<output>140/11 = around 12.727273</output>

<result>140/11 = around 12.727273</result>