[{"title": "Area of a Rectangle", "content": "Find the area of a rectangle with length 12 cm and width 6 cm. Area = length × width.", "solution": "A = 12 × 6 = 72 cm²"}, {"title": "Perimeter of a Rectangle", "content": "Find the perimeter of the same rectangle. P = 2(length + width).", "solution": "P = 2(12 + 6) = 2(18) = 36 cm"}]