In the "I am a law-abiding star" speech event held by the school, 18 students have finished their speeches, which is less than the number of students who have not given a speech (3/5). How many students in total participated in the presentation?
在学校举办的"我是遵纪守法小明星"演讲活动中，已有18名学生演讲完，比未演讲的人数少(3/5)．参加演讲的共有多少名学生？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">18 / (2/5)</gadget>
<output>45</output>

<gadget id="calculator">45 + 18</gadget>
<output>63</output>

<result>63</result>