Answer:

1000ml

Step-by-step explanation:

Just divide 800 by the part it tajes or how full the cintainer is when it has 800ml.

So, 800 ÷ 4 = 200

This gives us ⅕ of the capacity of the container.

To solve for the full capacity, simply multiply the ⅕ of the capacity by it's denominator, 5.

200ml (⅕) x 5 (denominator) = 1000ml (whole capacity)