There are 840 kilograms of goods in the freight yard, which can only be transported three times by two cars. How many kilograms of goods are transported by each car on average?
货场有840千克货物，用2两汽车3次才能运完，平均每辆车每次运货多少千克？
<gadget id="calculator">840 / 3 / 2</gadget>
<output>140</output>

<result>140</result>