public static double length_rope ( double r ) {
  return ( ( 2 * PI * r ) + 6 * r ) ;
}

public static double length_rope ( double r ) { return ( ( 2 * PI * r ) + 6 * r ) ; }
(method_declaration (modifiers) type: (floating_point_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (floating_point_type) name: (identifier))) body: (block (return_statement (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (identifier))) right: (binary_expression left: (decimal_integer_literal) right: (identifier)))))))