[{"title": "Area of a Rectangle", "content": "Find the area of a rectangle with length 6 cm and width 7 cm. Area = length × width.", "solution": "A = 6 × 7 = 42 cm²"}, {"title": "Perimeter of a Rectangle", "content": "Find the perimeter of the same rectangle. P = 2(length + width).", "solution": "P = 2(6 + 7) = 2(13) = 26 cm"}]