燃費変換

# Fuel efficiency conversions in Python

def l_per_100km_to_mpg_us(l_per_100km):
    """Convert L/100km to US MPG"""
    return 235.214 / l_per_100km

def mpg_us_to_l_per_100km(mpg):
    """Convert US MPG to L/100km"""
    return 235.214 / mpg

def km_per_liter_to_mpg(km_l):
    """Convert km/L to US MPG"""
    return km_l * 2.35214

def mpg_to_km_per_liter(mpg):
    return mpg / 2.35214

# Examples
print(l_per_100km_to_mpg_us(6))   # 39.2 MPG
print(l_per_100km_to_mpg_us(8))   # 29.4 MPG
print(mpg_us_to_l_per_100km(30))  # 7.84 L/100km
print(km_per_liter_to_mpg(15))    # 35.3 MPG

# UK MPG (uses imperial gallon = 4.54609 L)
def l_per_100km_to_mpg_uk(l_per_100km):
    return 282.481 / l_per_100km

print(l_per_100km_to_mpg_uk(6))   # 47.1 UK MPG