There are 500 large trucks, small cars and minibuses in the parking lot, of which small cars account for 3/5 of the total, and the ratio of large trucks to minibuses is 4:1. How many minibuses are there in this parking lot?
停车场有大货车、小汽车和中巴车共500辆，其中小汽车占总数的(3/5)，大货车和中巴车的比是4：1．这个停车场有多少辆中巴车？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

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

<gadget id="calculator">500 * (2/5) * (1/5)</gadget>
<output>40</output>

<result>40</result>