batch of 480 tons of goods can be transported 20 times by 6 vehicles. If each vehicle transports 1 ton more each time, how many times does this batch of goods need to be transported?
一批货物480吨，用6辆汽车20次可以运完，如果每辆汽车每次多运1吨，那么这批货物需要运多少次才能运完？
<gadget id="calculator">480 / 6 / 20</gadget>
<output>4</output>

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

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">480 / 30</gadget>
<output>16</output>

<result>16</result>