Solution of Problem 57 of the Collection of General Che

If the total amount of your purchases from the seller Михаил_Перович more than:
- 16531 ₽ the discount is 15%
- 8265 ₽ the discount is 10%
- 4133 ₽ the discount is 7%
- 1653 ₽ the discount is 5%
- 827 ₽ the discount is 3%
- 413 ₽ the discount is 2%
- 83 ₽ the discount is 1%

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57. What volume under normal conditions is occupied by 27 · 1021 gas molecules?