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Mathematical calculus
All right, friend, I'll help you solve this:

Step 1: First calculate the green area: 3.14x2x20 =1256 (square meter).

Step 2: Calculate the area of the middle flower bed: diameter =40x25%= 10 (m) radius r = 10 ÷ 2 = 5 (m) area: 3. 14X5X5=78.5 (m2).

Step 3: Calculate the lawn area: the green area minus the middle small flower bed area:1256-78.5 =1177.5 (square meter). Calculation completed.

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