Step 1 :\mathrm{Fuel \; Consumption \; Rate} = \frac{\mathrm{distance \; traveled}}{\mathrm{gas \; used}}
Step 2 :\mathrm{Fuel \; Consumption \; Rate} = \frac{56 \mathrm{~km}}{8 \mathrm{~l}}
Step 3 :\mathrm{Fuel \; Consumption \; Rate} = 7 \mathrm{~km/l}