7.1. On a long ribbon, the digits 201520152015 .... are written. Vasya cut out two pieces of the ribbon with scissors and formed a positive number from them, which is divisible by 45. Provide an example of such pieces and write down the number formed from them.
Answer: for example, you can cut out pieces "2" and "520" and form the number 2520, which is divisible by 45.

Other options are possible: from pieces 52 and 20, the number 5220 is formed; from pieces 1 and 2015, the number 12015; from pieces 201 and 15, the number 20115, and so on.

An example can be chosen based on the following considerations: a number is divisible by 45 if and only if it is divisible by 9 and by 5. Therefore, using the relevant divisibility rules, we get that in the second piece, the last digit must be either 5 or 0, and the sum of the digits in both pieces must be divisible by 9.

Grading criteria:

+ both pieces and the formed number are correctly indicated (no justification required)

$\pm$ both pieces are correctly indicated, but the formed number is not written

$\pm$ several examples of pieces and the formed number are provided, among which there are both correct and incorrect ones

干 the formed number is correctly indicated, but it is unclear from which pieces it is formed

- the problem is not solved or solved incorrectly