```\\nfunction tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\\n    unchecked {\\n        if (a == 0) return (true, 0);\\n        uint256 c = a * b;\\n        if (c / a != b) return (false, 0);\\n        return (true, c);\\n    }\\n}\\n```\\n