1. In three stores, there were 1973 textbooks. In the first three days, the first store sold respectively $1 / 47, 1 / 7$ and $1 / 2$ of its textbooks, the second store - $1 / 41, 1 / 5$ and $1 / 3$ of its textbooks, and the third store - $1 / 25, 1 / 20$ and $1 / 10$ of its textbooks. How many textbooks were in each store?
73.1. Answer. In the first store, there were 658 textbooks, in the second - 615, and in the third - 700.