input: def compoundInterest(investment_amount: float, rate_of_interest: float, time: int) -> float:
      """ Calculate the compound interest on an investment amount given the rate of interest and time period.
      >>> compoundInterest(1000, 5, 5)
      1276.28
      >>> compoundInterest(2000, 6, 10)
      3581.69
      """
output:     return round(investment_amount * (1 + rate_of_interest / 100) ** time, 2)