certain class of students wants to plant a batch of saplings. If each student is allocated k saplings, there will be 20 left; if each student is allocated 9 saplings, there will be 3 left. Then k = how much.
某班学生要栽一批树苗．若每个人分配k棵树苗，则剩下20棵；若每个学生分配9棵树苗，则还差3棵．那么k=多少．
<result>8</result>