input: def compoundInterest(investment_amount: float, rate_of_interest: float, time: int) -> float:
      """ Calculate the compound interest for a given investment amount, rate of interest,
      and time period.
      >>> compoundInterest(1000, 5, 5)
      1276.2815625
      >>> compoundInterest(2000, 3, 10)
      2687.832765851709
      """
output:     return investment_amount * (1 + rate_of_interest / 100) ** time