There are 120 cars and vans in the Century New Green Parking Lot, 50% of the vans are driven away, and 1/4 of the cars are driven away. At this time, the remaining number of cars is 12 less than the original 62.5% of the total number of vehicles. How many did the van drive away?
世纪新绿停车场有小轿车、面包车共120辆，面包车开走50%，小轿车开走(1/4)，这时小轿车剩下的辆数比原来车辆总数的62.5%少了12辆，面包车开走了多少辆？
<gadget id="calculator">62.5 / 100</gadget>
<output>0.625</output>

<gadget id="calculator">120 * 0.625</gadget>
<output>75</output>

<gadget id="calculator">75 - 12</gadget>
<output>63</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">63 / (3/4)</gadget>
<output>84</output>

<gadget id="calculator">120 - 84</gadget>
<output>36</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">36 * (1/2)</gadget>
<output>18</output>

<result>18</result>