In the bodmas sum the last fraction is

Dear Student, 

   In question where 'of' ' is given, it means Multiplication.

   So, $3\frac{1}{2} of 3\frac{1}{3}$ means $3\frac{1}{2}\times 3\frac{1}{3}=\frac{7}{2}\times \frac{10}{3}=\frac{70}{6}$ .
Hope this information clears your doubts.

Regards