1. The problem asks for the sum of the interior angles of a polygon with seven sides, called a heptagon. 2. The formula to find the sum of interior angles of any polygon is: $$\text{Sum of interior angles} = (n - 2) \times 180$$ where $n$ is the number of sides of the polygon. 3. For a heptagon, $n = 7$. Substitute this into the formula: $$\text{Sum} = (7 - 2) \times 180$$ 4. Simplify inside the parentheses: $$\text{Sum} = 5 \times 180$$ 5. Multiply to find the sum: $$\text{Sum} = 900$$ 6. Therefore, the sum of the interior angles of the heptagon is $900$ degrees.