When a bus stops at a station, (1/4) passengers get off, and 6 passengers get on, and the number of passengers on the bus at this time is exactly (9/10) of the number of passengers on the bus at the beginning. How many passengers were there in the car at this time?
一辆公共汽车在一个站点停车时有(1/4)的乘客下车，又上来6名乘客，这时车上的人数正好是一开始车上乘客数的(9/10)．这时车上有乘客多少人？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(9/10) - (3/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 / (3/20)</gadget>
<output>40</output>

<gadget id="calculator">40 * (9/10)</gadget>
<output>36</output>

<result>36</result>