What are the mathematical expressions and text in the image?

Mathematical Expressions and Text:

• Mathematical expressions are present at the top of the image, including: '*' + '*' = '\triangle', and '2 + \triangle = 8'.
• A numerical calculation is written across the top of the text: '3500.660 = 2310000.5604 * 473'.
• The main body of text describes a word problem in Russian.