100 students will go to the Children's Palace 33 kilometers away from the school. There is only one car that can carry 25 people. In order to make all the students reach their destination as soon as possible, they decided to take a combination of walking and riding. It is known that the student's walking speed is 5 kilometers per hour, and the speed of the car is 55 kilometers per hour. To ensure that all students arrive at the destination as soon as possible, what is the time required (the time taken to get on and off the bus is not counted).
100名学生要到离校33千米处的少年宫活动．只有一辆能载25人的汽车，为了使全体学生尽快地到达目的地，他们决定采取步行与乘车相结合的办法．已知学生步行速度为每小时5千米，汽车速度为每小时55千米．要保证全体学生都尽快到达目的地，所需时间是多少(上、下车所用的时间不计)．
<gadget id="calculator">33 / 9</gadget>
<output>11/3 = around 3.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(11/3) * (3/5)</gadget>
<output>11/5 = around 2.2</output>

<gadget id="calculator">6 / 55</gadget>
<output>6/55 = around 0.109091</output>

<gadget id="calculator">(11/3) * (6/55)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(11/5) + (2/5)</gadget>
<output>13/5 = around 2.6</output>

<result>13/5 = around 2.6</result>