I've seen this problem in 4th grade exersize book: fill the tank with 4 liters of water using 3-liter and 5-liter buckets.
We could employ computer and solve it using brute force approach - by checking all available variants. Here is the calculator.
Save the calculation to reuse next time or share with friends.
Search depth limits the outputted solutions to certain number of actions (otherwise you can get many repetitions)