能不能分开算呢？
int one = 10 ;
int two = 20 ;
int three = 0 ;
three=one+two;
three*=two;
System.out.println(three);
three/=two;
System.out.println(three);
结果是按照后面算好的three接着算的，能不能按照前面的three也就是30算哪？
