Jason is on a uninhabited island, and he wants to escape from the island which must use rope and wood to make a wooden boat and prepare food. It takes $3$ days to cut wood, $1$ day to weave wet grass into rope, $5$ days to dry the wood, $1$ day to mow the grass, $1$ day to prepare food, $1$ day to soak cut grass, and $1$ day to choose wood. At least how long will it take for Jason to get ready? 
Overseas Competition->Knowledge Point->Counting Modules