public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  long ans = 1 ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    ans *= i ;
    if ( ans > Math . pow ( 10 , 9 ) + 7 ) ans %= Math . pow ( 10 , 9 ) + 7 ;
  }
  System . out . println ( ( long ) ans % ( ( long ) Math . pow ( 10 , 9 ) + 7 ) ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; long ans = 1 ; for ( int i = 1 ; i <= N ; i ++ ) { ans *= i ; if ( ans > Math . pow ( 10 , 9 ) + 7 ) ans %= Math . pow ( 10 , 9 ) + 7 ; } System . out . println ( ( long ) ans % ( ( long ) Math . pow ( 10 , 9 ) + 7 ) ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (decimal_integer_literal))) right: (decimal_integer_literal)))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (decimal_integer_literal))) right: (decimal_integer_literal))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (cast_expression type: (integral_type) value: (identifier)) right: (parenthesized_expression (binary_expression left: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (decimal_integer_literal)))) right: (decimal_integer_literal)))))))))