84 students in the sixth grade rent a car to visit. They can take a big car with 20 people for 120 yuan each, or a small car with 12 people can rent a big car (2/3). How to rent a car with the least cost?
六年级84名同学租车去参观，可乘20人的大车每辆租金120元，或乘12人的小车每辆租金是大车的(2/3)，怎样租车费用最少？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<gadget id="calculator">360 + 160</gadget>
<output>520</output>

<result>520</result>