After a bus arrives at a stop, 40% of the people get off the bus, and 6 people get on the bus. At this time, the number of people on the bus is 2/3 of the original number. How many people were there on the bus?
一辆公共汽车到了一车站后，下车的人占40%，又上了6人，这时车上的人数是原来人数的(2/3)，车上原来有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / 100</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">(2/3) - (3/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">6 / (1/15)</gadget>
<output>90</output>

<result>90</result>