Property price calculation

[oli_action]

Hi. I'm a beginner stuck with a problem and need help please. I need to calculate the total property size ( width and length ) and then the total cost of the property. I need to print the final property sum in the shell

I've managed the following very basic setup:
This is basically how it should work with the given parameters.

>>> length = 15
>>> width = 10
>>> price = 8.99
>>> total_m2 = length * width
150
>>> print(total * price)
1348.5

But, I'm trying to implement the following:

>>> squaremeters = "m2"
>>> euro = "€"
>>> length = 15
>>> width = 10
>>> price = euro + str(8.99) + squaremeters
'€8.99m2'
>>> totalm2 = length * width
150
>>> total_m2 = str(totalm2) + squaremeters
'150m2'
>>>print = (total_m2 * price)   
TypeError: can't multiply sequence by non-int of type 'str'

I've tried using multiple data types, but i keep getting the same or similar error. Is it just not possible or have I gone completely off the beaten track here? So confused!

Thanks in advance