There is a group of people who want to buy a boat together, and 10 people quit later. After calculation, the remaining people have to pay 1 yuan each, and 15 people quit after the actual payment. As a result, each person has to pay an extra 2 yuan. How many people want to buy a boat?
有一批人要合买一条船，后来有10人退出，经过计算，剩下的人每人要出1元，实际付款又有15人退出，结果，每人又要多出了2元，原来想买船的人共有多少个．
<result>100</result>