45 students go boating in the park. The ticket price is 8 yuan per person. If you give 400 yuan to the conductor, how much should you get back? (Write out the quantitative relationship, and then list the solution)
45个同学去公园划船，票价是每人8元，给售票员400元钱，应找回多少钱？(写出数量关系，再列式解答)
<gadget id="calculator">8 * 45</gadget>
<output>360</output>

<gadget id="calculator">400 - 360</gadget>
<output>40</output>

<result>40</result>