A construction site needs 1080 bags of cement, and 3 vehicles with the same load have been transported 4 times, which is exactly half of the transport. The rest is being transported by adding a vehicle of the same model. How many times will it take to complete the transport?
某工地需要1080袋水泥，3辆载重相同的汽车运了4次正好运了一半，余下的在增加一辆同样型号的汽车来运，还需要几次运完？
<gadget id="calculator">1_080 / 2</gadget>
<output>540</output>

<gadget id="calculator">540 / 3 / 4</gadget>
<output>45</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">45 * 4</gadget>
<output>180</output>

<gadget id="calculator">540 / 180</gadget>
<output>3</output>

<result>3</result>