def resistance_calculator(
    material: str, lenght: float, section: float, temperature: float
):
    """
    material is a string indicating the material of the wire

    lenght is a floating value indicating the lenght of the wire in meters

    diameter is a floating value indicating the diameter of the wire in millimeters

    temperature is a floating value indicating the temperature at which the wire is operating in °C

    Available materials:
    - silver
    - copper
    - aluminium
    - tungsten
    - iron
    - steel
    - zinc
    - solder"""

    materials = {
        "silver": {"rho": 0.0163, "coefficient": 0.0038},
        "copper": {"rho": 0.0178, "coefficient": 0.00381},
        "aluminium": {"rho": 0.0284, "coefficient": 0.004},
        "tungsten": {"rho": 0.055, "coefficient": 0.0045},
        "iron": {"rho": 0.098, "coefficient": 0.006},
        "steel": {"rho": 0.15, "coefficient": 0.0047},
        "zinc": {"rho": 0.06, "coefficient": 0.0037},
        "solder": {"rho": 0.12, "coefficient": 0.0043},
    }

    rho_20deg = materials[material]["rho"]
    temp_coefficient = materials[material]["coefficient"]

    rho = rho_20deg * (1 + temp_coefficient * (temperature - 20))
    resistance = rho * lenght / section

    return f"{resistance}Ω"