There are some passengers on a bus. When it arrives at Wenhua Road Station, (2/5) people get off, and another 30 people get on. At this time, the original passengers on the bus are exactly (6/5). How many passengers were there in the car?
一辆公共汽车上有一些乘客，到文化路站时，有(2/5)的人下车，又上来了30人，这时车上的乘客正好是原来的(6/5)．车上原有乘客多少人？
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(6/5) - (3/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>