Multi-turn tool-use scenario.
Tools involved: VehicleControlAPI
MathAPI

User requests (one per turn):
user: I require assistance with my car. Can you kindly ensure that the fuel tank is refilled with precisely 38 liters of petrol? Make sure using 2 decimal digit for gallon amount.
user: Wonderful, with the fuel tank now adequately replenished, proceed to activate the engine in "START" mode. Convey to me a statistics.
user: Oh I should have been more clear. I want the climate of car.

Expected function call sequence:
VehicleControlAPI.liter_to_gallon
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
MathAPI.mean