Ihave 1.5 liters of gas, i use 800ml, how much gas do i have left?

700ml because 1000ml is a liter so you had 1500 total just got to subtract the 800 to find the answer

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.