we have the following:
[tex]\begin{gathered} 4\cdot\frac{7}{77}\cdot87+7789\cdot7-880 \\ \end{gathered}[/tex]the priority is multiplication and division:
[tex]31.63+54523-880[/tex]now if the additions and subtraction
[tex]31.63+54523-880=53674.63[/tex]the result is 53674.63
