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