30 students from class 5 and 2 hold a rope skipping competition, in which the mode of the number of rope skipping is 85, which occurs 12 times. The average number of skipping ropes of the rest of the students is 20 times more than the average number of all participating students. Find the average number of jumps for all participating students?
五2班30名同学举行跳绳比赛，其中跳绳个数的众数是85，出现12次．其余同学平均跳绳的个数比全部参赛同学的平均个数还多20下．求全部参赛同学平均每人跳多少下？
<gadget id="calculator">85 * 12</gadget>
<output>1_020</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<gadget id="calculator">12 * 20</gadget>
<output>240</output>

<gadget id="calculator">600 - 240</gadget>
<output>360</output>

<gadget id="calculator">1_020 + 360</gadget>
<output>1_380</output>

<gadget id="calculator">30 - 30</gadget>
<output>0</output>

<gadget id="calculator">12 + 0</gadget>
<output>12</output>

<gadget id="calculator">1_380 / 12</gadget>
<output>115</output>

<result>115</result>