car is full of people when it leaves the station. On the way to a certain station, (1/8) passengers get off and 21 people get on the car. At this time, there are 6 passengers without seats. How many passengers are there.
一辆汽车，从车站开出时坐满了人，途中到打某站，有(1/8)的乘客下车，又有21人上车，这时有6位乘客没有座位，这时车内有乘客多少人．
<gadget id="calculator">21 - 6</gadget>
<output>15</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">15 / (1/8)</gadget>
<output>120</output>

<gadget id="calculator">120 + 6</gadget>
<output>126</output>

<result>126</result>