There is a batch of goods, if 20 trucks are shipped every day, it can be shipped in 30 days. Now the shipment needs to be finished 5 days in advance, how many cars should be shipped every day? (Use proportional solution, please write down the simple judgment process)
有一批货物，如果每天运20车，30天可以运完．现在要提前5天运完，每天应运多少车？(用比例解，请你写出简单判断过程)
<gadget id="calculator">20 * 30</gadget>
<output>600</output>

<gadget id="calculator">30 - 5</gadget>
<output>25</output>

<gadget id="calculator">600 / 25</gadget>
<output>24</output>

<result>24</result>