I'm not in the python track (yet) and I'm not sure what is this question for but I'll try to explain.

Two of the data types in python are integers and strings.

variable = 2 #this stores the number 2 in the variable.

variable = "2" #this stores the string 2 in the variable.

In python you have two build-in functions - int() and str().

The int() function converts what's inside the parentheses into an integer. An integer is a whole number and in rounds the number if it is with a floating point. So int(2.3) will be converted to 2.

The str() function converts what's inside the parentheses into a string. So str(2) will be converted to 2. But this is a string, not an integer. You cannot for example make addition operation like str(2) + 5. It will give you an error.

But you can make an addition operation like this int(2) + 5. The result will be 7.

So for your question.

create 2 new variables, one named estimate that holds the rounded number of days you've lived and, one named summary that adds the string version of estimate into "I am {} days old!".

lived_days = 12345.5432 #making a variable that stores the number of days you lived. I chose random number.

estimate = int(lived_days) #the variable "estimate" contains the number 12346 (rounded 12345.5432)

summary = "I am " + str(estimate) + " days old" #the variable "summary" stores the string "I am 12346 days old".

In the summary variable, you have to use the str() function because you can't concatenate strings and numbers, so you have to convert "estimate" into a string.

I hope I helped.

Good Luck!