The user has provided an image with mathematical diagrams and equations on a chalkboard. The task is to interpret and present this information in a structured format. Based on the visual cues and OCR output, the image contains geometric shapes with dimensions, and some cost calculations per square meter. Specifically, there are: 1. A diagram of a combined rectangular shape with dimensions labeled '12' and '6' on the exterior, and '300' for an internal dimension. There's also an arrow indicating a direction or measurement. 2. A formula or expression 'h-3'. 3. Two smaller rectangular shapes labeled with dimensions: one is 1x2, and the other is 3x1.5. 4. Textual elements that appear to be cost calculations: '4T-? 300гр/м²' and 'Кр-? 100гр/м²'. 5. A question mark next to 'V-?'. The overall task is to analyze these elements as data, potentially as part of a geometry or cost estimation problem. Given the constraints, the output should be a JSON object containing a structured representation of the data extracted from the image. Since there are no explicit questions to answer, the output should focus on presenting the visible data in a parseable format. However, since the prompt asks for a JSON output based on an image, and implies a task to be performed, I will structure it as if I am providing an analysis of the elements presented, assuming a context of mathematical problem-solving.