The number of male passengers on the bus is twice that of female passengers. At a certain station, two female passengers get off the bus. At this time, the number of male passengers on the bus is three times that of female passengers. How many male passengers are there?
公共汽车上的男乘客人数是女乘客的2倍，在某站有2名女乘客下车，这时，车上男乘客人数是女乘客的3倍，原来有多少名男乘客．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">6 / 1</gadget>
<output>6</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<result>12</result>