I remember that a grandson asked for soldiers, which was very interesting. The topic is as follows:

There are some things today, but I don't know the number of them. Three, three, two, five, five, three, seven, seven, two. Ask geometry?

The title means: there is a pile of things, the number of which is unknown. Three times three, there are two left, five times five, seven times seven. What is the quantity of this pile of goods? This problem of "not knowing the number of things" is the world-famous "grandson problem". Because its solution was discovered in China more than 500 years ago, it is also called "China remainder theorem" or "Sun Tzu theorem".

The answer is 23+2 1k(k is a positive integer).

Please think for yourself.