Fighting for Hegemony with High Martial Arts: I Rely on Spreading Beans to Form an Army and Conquer the World

At the beginning, the enemy's troops are approaching the city. What should you do? I know you are in a hurry, but don't worry yet. General skill: Scattered beans into soldiers. If you drop a handful of beans, you won't be able to cut down all the enemies outside the city. After cutting this one, I still have one more. How many more do I have, you ask? Well, there's another sack over there, and there's another warehouse in the warehouse.