Understanding Acceleration due to Gravity
Acceleration due to gravity is the force that pulls objects towards the center of the earth. This force is what gives objects weight and is responsible for keeping planets in their orbits. The acceleration due to gravity on the surface of the earth is approximately 9.8 meters per second squared (m/s²).

Calculating the Distance
To calculate the distance from the surface of the earth at which acceleration due to gravity is the same below and above the surface, we need to use the formula for the acceleration due to gravity:

g = G * M / r²

Where g is the acceleration due to gravity, G is the gravitational constant, M is the mass of the earth, and r is the distance from the center of the earth.

If we assume that the mass of the earth is constant, we can set the acceleration due to gravity below the surface of the earth equal to the acceleration due to gravity above the surface of the earth.

g below = g above

G * M / (R + h)² = G * M / R²

Where R is the radius of the earth and h is the distance from the surface of the earth.

Solving for h, we get:

h = R * [(g above / g below) - 1]

Substituting the values of g above and g below, we get:

h = R * [(9.8 / 9.8) - 1] = 0

This means that the distance from the surface of the earth at which acceleration due to gravity is the same below and above the surface is zero. In other words, acceleration due to gravity is the same everywhere on the surface of the earth.

Conclusion
In conclusion, the distance from the surface of the earth at which acceleration due to gravity is the same below and above the surface is zero. This is because the acceleration due to gravity is constant everywhere on the surface of the earth.