1. **State the problem:** We need to find the area of a parallelogram with a base of 15 cm and a height of 8 cm. 2. **Formula:** The area $A$ of a parallelogram is given by the formula: $$A = \text{base} \times \text{height}$$ 3. **Apply the values:** Substitute the base and height into the formula: $$A = 15 \times 8$$ 4. **Calculate:** $$A = 120$$ 5. **Interpretation:** The area of the parallelogram is 120 square centimeters. This means the parallelogram covers 120 cm² of space on the plane.