Metric Converter(Simple Conditions)

distance = float(input())
input_metric = input()
output_metric = input()

if input_metric == "m":
    distance /= 1000
elif input_metric == "cm":
    distance /= 100000
elif input_metric == "mm":
    distance /= 1000000
elif input_metric == "mi":
    distance /= 0.621371192
elif input_metric == "in":
    distance /= 39370.0787
elif input_metric == "ft":
    distance /= 3280.8399
elif input_metric == "yd":
    distance /= 1093.6133

if output_metric == "m":
    distance *= 1000
elif output_metric == "cm":
    distance *= 100000
elif output_metric == "mm":
    distance *= 1000000
elif output_metric == "mi":
    distance *= 0.621371192
elif output_metric == "in":
    distance *= 39370.0787
elif output_metric == "ft":
    distance *= 3280.8399
elif output_metric == "yd":
    distance *= 1093.6133

print(distance)

РЕШЕНИЕ С КОЛЕКЦИЯ:

metrics_to_km = {
    "km": 1,
    "m": 1000,
    "cm": 100000,
    "mm": 1000000,
    "mi": 0.621371192,
    "in": 39370.0787,
    "ft": 3280.8399,
    "yd": 1093.6133
}

distance = float(input())
input_metric = input()
output_metric = input()

print(distance / metrics_to_km[input_metric] * metrics_to_km[output_metric])