The school organized a spring outing, and 40 students in the fourth grade went to Sanmao Paradise. Tickets were 10 yuan per person. If you want to play the water yacht project, you need to pay an additional 3 yuan per person. The fourth grade spent a total of 460 yuan on this spring outing. May I ask how many students participated in the water yacht project?
学校组织春游，四年级40名同学去了三毛乐园，门票每人10元，如果要玩水上游艇项目的需要每人另付3元．四年级本次春游一共花了460元，请问有多少名同学参加了水上游艇项目？
<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<gadget id="calculator">460 - 400</gadget>
<output>60</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<result>20</result>