Rent a car to transport 92 tons of chemical fertilizers from A to B. It is known that the shipping fee for a large truck with a load of 8 tons is 300 yuan per trip, and for a small car with a load of 3 tons is 135 yuan per trip. Please design the most economical one. Car rental plan, and how much is the total shipping cost?
租用汽车从甲地运92吨化肥到乙地，已知载重8吨的大车每辆每趟运费300元，载重3吨的小车每辆每趟运费135元，请你设计一个最省钱的租车方案，并算出总运费是多少元？
<gadget id="calculator">300 * 10</gadget>
<output>3_000</output>

<gadget id="calculator">135 * 4</gadget>
<output>540</output>

<gadget id="calculator">3_000 + 540</gadget>
<output>3_540</output>

<result>3_540</result>