1. The problem appears to involve understanding or calculating something related to the arrangement of rectangles labeled with numbers 7, 1, 1, and 1, and a label "x0" below them, with the word "Root" above and a single rectangle labeled "7" above that. 2. Since the problem is not explicitly stated, let's assume you want to find the total length or sum of the values of the rectangles in the row. 3. The formula to find the total length or sum of adjacent segments is: $$\text{Total} = \sum_{i=1}^n \text{length}_i$$ 4. Here, the lengths are 7, 1, 1, and 1. So, $$\text{Total} = 7 + 1 + 1 + 1$$ 5. Calculate the sum: $$7 + 1 + 1 + 1 = 10$$ 6. Therefore, the total length or sum of the rectangles is $10$. If you meant something else by "1-tact" or the "Root" label, please clarify the problem statement for further assistance.