Question

84 divided into sevenths added to 9 divided into thirds

Answer 1

(84÷7)+(9÷3) The parentheses are not necessary but I just put them.
I think that's what you meant. If you meant the other thing this would be the equation: (84÷7+9)÷3. Here the parentheses are nessasary

Answer 2

600+27=627 hope this helps you!