First, he took a flock of 200 female goats and sent them ahead of him toward Esau. He put a servant in charge, and instructed the servant in this way:
Jacob thought that he might soften Esau’s heart in this way, and escape with his life. But then he got to thinking (I do not know how long it took him to think this way, probably immediately), “Suppose the flock of 200 female goats was not enough? Suppose Esau was not satisfied?” He decided to send 20 male goats after them, so the number of animals is accumulating. After the male goats, Jacob sent 200 ewes. After the ewes, there were 20 rams. After the rams, he sent 30 female camels and their young. Then came 40 cows, ten bulls, 20 female donkeys, ten male donkeys—was he terrified of Esau, his brother? He must have been, because he was trying to pay him off.
So he is ramping up every time the servant says, “This is from my lord Jacob and my lord Jacob is behind us” and then again “This is from Jacob and Jacob is behind us.” He does not know when this cycle is going to stop. It might just keep on going and going. But he is ratcheting up Esau’s excitement to meet his brother.