Answer:
3.141592653589793238462643383279502884197169399375105820974944592307816406286
Step-by-step explanation:
13+9=22
5+18=23
22x23=506
½x5x13=32.5
9x5=45
½x9x18=81
506-32.5-45-81=347.5
Hello!
It would be 24.79 but if the answer were to be rounded, it would be 25
Hope this helps! :)