One car carries 450 kg of goods, and the other car carries 180 kg less than it. How many kilograms are the two vehicles carrying in total?
一辆车运货450千克，另一辆车比它少运180千克．两辆车一共运货多少千克？
<gadget id="calculator">450 - 180</gadget>
<output>270</output>

<gadget id="calculator">450 + 270</gadget>
<output>720</output>

<result>720</result>