You have to solve
[tex]66+43\cdot77\div4[/tex]Remember that following the order of operations, you have to solve the divisions/multiplications first and then addition/subtractions as the last operation.
To make the order easier I'm going to separate the operations using parentheses.
First comes the division 77÷4, then you have to multiply the result by 43 and to finish you have to add the result to 66
[tex]66+(43\cdot(\frac{77}{4}))[/tex]1) Solve the division
[tex]66+(43\cdot19.25)[/tex]2) Solve the multiplication
[tex]66+(43\cdot19.25)=66+827.75[/tex]3) Add the remaining values
[tex]66+827.75=893.75[/tex]