View Compilation Error

0_0_5384495_6243\Main.java:12: ';' expected
  BigInteger fact(long n){
                 ^
0_0_5384495_6243\Main.java:12: ';' expected
  BigInteger fact(long n){
                        ^
0_0_5384495_6243\Main.java:21: reached end of file while parsing
}