Each train car can transport 40 tons of goods, and now it is necessary to transport 640 tons of goods, how many cars are needed?
每节火车车厢可运货物40吨，现在要运走640吨货物，需要多少节车厢？
<gadget id="calculator">640 / 40</gadget>
<output>16</output>

<result>16</result>