159. The Miller's Fee. Here is a very simple puzzle, although I have met people who pondered over it for several minutes.

A miller took $\frac{1}{10}$ of the total flour as payment for grinding. How much flour was obtained from the peasant's grain if he was left with one sack after paying the miller?
159. From the peasant's grain, there should have been \(1 \frac{1}{9}\) bags of flour, which after paying \(\frac{1}{10}\) of all the flour would exactly amount to one bag.