The school held a "small production" competition. There are 40 participants in the third grade, 15 more participants in the fourth grade than the third grade, and twice as many participants in the fifth grade as the total number of the third and fourth grades. How many fifth graders are participating?
学校举行"小制作"比赛．三年级有40人参赛，四年级参赛的人数比三年级多15人，五年级参赛的人数是三、四年级总人数的2倍．五年级有多少人参赛？
<gadget id="calculator">40 + 40 + 15</gadget>
<output>95</output>

<gadget id="calculator">95 * 2</gadget>
<output>190</output>

<result>190</result>