The car team needs to transport goods. If each car transports 12 tons, 20 cars are needed. If each car transports 8 tons, how many cars are needed?
汽车队要运送货物，如果每辆车运12吨，需要20辆，如果每辆车运8吨，需要汽车多少辆？
<gadget id="calculator">20 / 8</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">12 * (5/2)</gadget>
<output>30</output>

<result>30</result>