A train is going from Jinan to Beijing. When the train arrives at Tianjin Station, 20% of the people get off the train, and another 48 people get on the train at Tianjin Station. At this time, there are only the original (7/8) passengers on the train. Get off from Tianjin How many people are in the car?
一列火车从济南开往北京，当列车到达天津站时有20%的人下车，在天津站又有48人上车，这时车上的旅客只有原来的(7/8)，从天津下车的有多少人？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(7/8) - (4/5)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">48 / (3/40)</gadget>
<output>640</output>

<gadget id="calculator">640 * (1/5)</gadget>
<output>128</output>

<result>128</result>