Surface Area of Cube

Write a Python function `surface_area_of_cube(side_length)` that calculates and returns the surface area of a cube given the length of one of its sides.

The surface area of a cube is calculated using the formula:

\[ \text{Surface Area} = 6 \times \text{side\_length}^2 \]

#### Example Usage
```python [main.nopy]
print(surface_area_of_cube(5))  # Output: 150
print(surface_area_of_cube(3))  # Output: 54
print(surface_area_of_cube(10)) # Output: 600
```

#### Constraints
- The input `side_length` will be a positive integer.
- The function should return an integer representing the surface area.
def surface_area_of_cube(side_length):
    """
    Calculate the surface area of a cube given the side length.

    Args:
    side_length (int): The length of one side of the cube.

    Returns:
    int: The surface area of the cube.
    """
    # Placeholder for the solution
    pass
Beginner mathfunctions
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