Divide the nine natural numbers from 1 to 9 into two groups, so that the sum of the numbers in one group is 8 times the sum of the numbers in the other group. How many different division methods are there?
将1至9这九个自然数分成两组，使其中一组各数之和是另一组各数之和的8倍，共有多少种不同的分法．
<result>3</result>