There are 50 cars in the parking lot, which is 4 less than the number of buses (2/5). How many buses are there in the parking lot?
停车场里有50辆小汽车，比大客车的(2/5)少4辆，停车场里有大客车多少辆？
<gadget id="calculator">4 + 50</gadget>
<output>54</output>

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

<gadget id="calculator">54 / (2/5)</gadget>
<output>135</output>

<result>135</result>