单位转换

def solve():
    def meter_to_cm(m):
        return m * 100
    def kg_to_g(kg):
        return kg * 1000
    def liter_to_ml(l):
        return l * 1000
    print(f"3米 = {meter_to_cm(3)}厘米")
    print(f"2千克 = {kg_to_g(2)}克")
    print(f"0.5升 = {liter_to_ml(0.5)}毫升")