Whenever he had free time, Lizhong would teach them accounting. Tie Tou was a slow learner; after many days, he only knew how to add and subtract within ten. Lizhong told him to practice more whenever he had the chance.
Wang Pangtou had been babbling to himself for quite a while without hearing Tie Tou utter a word. Turning his head, he saw Tie Tou seriously counting on his fingers and fell silent, deciding not to disturb him.
Within half an hour, they arrived at the warehouse. Little Black automatically turned around and then reversed, parking the flatbed cart firmly in front of the warehouse door.
Wang Pangtou happily patted its head, praising its intelligence. He took out the key, opened the door, and was about to ask Tie Tou, who was still busy with counting, to get off the cart and move the grain, when he inadvertently saw a person sneakily peeking around the corner not far away.