An empire of copper coins

A young man picked up a copper coin on the street. He used the copper coin to buy some syrup and water for the flowers; each of them gave him a bunch of flowers. He sold the flowers and got 8 coins.
One day, the wind and rain, the garden is full of the fallen branches and fallen leaves. The young man said to the gardener, "If all these leaves are owned by me, I can clean the garden. "Gardeners are happy. The young man gave some sweets to a group of children, and they helped them pick up all the broken branches and leaves. The royal cook saw the pile of firewood and then bought and transported it. The young man got 16 coins.
The young man placed several buckets not far from the city for drinking by hundreds of cutover workers. Soon I met another merchant, who said that a trafficker brought many horses to the city. After hearing the merchant's words, he told the workers to ask each of them to give him a bundle of grass. The workers agreed in succession to thank him. When the horse vendor came, he needed to buy the feed, and the young man had bought all the grass with 1000 copper coins.
A few years later, the young man became a famous richest man. His family's money was a copper coin.