The school held a sports meeting, with 45 participants in the third grade, three times the number of participants in the fourth grade, and 15 more participants in the fifth grade than the total number of participants in the third and fourth grades. How many people in the fifth grade participated in the competition?
学校举行运动会，三年级有45人参加，四年级参加的人数是三年级的3倍，五年级参加的人数比三、四年级参加的总人数还多15人．五年级参加比赛的有多少人？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">45 + 135 + 15</gadget>
<output>195</output>

<result>195</result>