Carl and Ellie split a chocolate bar into 8 pieces of the same size. Carl took 7 of the pieces and Ellie took 1 of them they then divided a 2 chocolate bars of the same type into 16 pieces of equal size. Then they gave some of them to their sister and then equally split the remaining pieces between the 2 of them. After all this Carl's quantity of chocolate ended up being 4 times Ellie's quantity. How many pieces of the 2 bar did they each get? Write an equation and solve it to answer the question