def convert_kg_to_g(weight_kg):
    weight_g = weight_kg * 1000
    return weight_g

convert_kg_to_g(2.2)

def predicted_value(a, b, x):
    prediction = a + b * x
    return prediction

predicted_value(2, 1, 1)

def convert_kg_to_g(weight_kg):
    weight_g = weight_kg * 1000
    return weight_g
result = convert_kg_to_g(3.9)
print weight_g