public static void main ( String [ ] __ ) {
  int n = s . nextInt ( ) , chokudai = s . nextInt ( ) , kame = s . nextInt ( ) ;
  double dist = s . nextInt ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    dist = dist / chokudai * kame ;
  }
  System . out . printf ( "%.20f" , dist ) ;
}

public static void main ( String [ ] __ ) { int n = s . nextInt ( ) , chokudai = s . nextInt ( ) , kame = s . nextInt ( ) ; double dist = s . nextInt ( ) ; for ( int i = 0 ; i < n ; i ++ ) { dist = dist / chokudai * kame ; } System . out . printf ( " % .20f " , dist ) ; }
(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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (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: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal) (identifier))))))