data=input("please input pricipal and years ,split by comma:")
pricipal,year=[int(x) for x in data.split(",")]
revence=pricipal*((1+year)**rate)
print("expected revence is :%.2f"%revence)
data=input("please input pricipal and years ,split by comma:")
pricipal,year=[int(x) for x in data.split(",")]
revence=pricipal*((1+year)**rate)
print("expected revence is :%.2f"%revence)