def METHOD_NAME(trial: Trial) -> float:
    x1 = trial.suggest_float("x1", 0.1, 3)
    x2 = trial.suggest_float("x2", 0.1, 3, log=True)
    x3 = trial.suggest_float("x3", 2, 4, log=True)
    return x1 + x2 * x3