A tank has $$2$$ ℓ of water.  A jug can hold $$7$$ ℓ~ of water.  Tom adds $$4$$ such jugs of water into the tank.  How much water is there in the tank now?  There are~\uline{~~~~~~~~~~}~ℓ of water in the tank now. 
Overseas Competition->Knowledge Point->Word Problem Modules->Unitary Method Problems->Finding the Total Value using Unitary Method