Answer :

Sure, let's break down the solution step by step.

1. Understand the problem:
- Lanh's car has a fuel efficiency of 40 miles per gallon.
- He drove a total distance of 120 miles.
- We need to find out how many liters of gas he used, knowing that 1 gallon is equivalent to 3.79 liters.

2. Calculate the number of gallons of gas used:
- If Lanh's car gets 40 miles per gallon, we can determine the number of gallons used by dividing the total miles driven by the car’s miles per gallon.
- Total miles driven = 120 miles
- Miles per gallon = 40 miles per gallon
- Number of gallons used = Total miles driven / Miles per gallon
[tex]\[ \text{Number of gallons used} = \frac{120 \text{ miles}}{40 \text{ miles per gallon}} = 3 \text{ gallons} \][/tex]

3. Convert the number of gallons to liters:
- Given that 1 gallon is equivalent to 3.79 liters, we can convert the gallons used to liters by multiplying the number of gallons by the number of liters per gallon.
- Number of gallons used = 3 gallons
- Liters per gallon = 3.79 liters/gallon
- Number of liters used = Number of gallons used [tex]\(\times\)[/tex] Liters per gallon
[tex]\[ \text{Number of liters used} = 3 \text{ gallons} \times 3.79 \text{ liters/gallon} = 11.37 \text{ liters} \][/tex]

4. Conclusion:
- Lanh used 3 gallons of gas to drive 120 miles.
- Converted to liters, this amounts to 11.37 liters of gas.

So, Lanh used 11.37 liters of gas to drive 120 miles with his hybrid car.