We can use the formula for gravitational acceleration:
a = G * M / r^2
where G is the gravitational constant, M is the mass of the sun, and r is the radius of the sun. Plugging in the values, we get:
a = (6.67 x 10^-11 N m^2/kg^2) * (2.0 x 10^30 kg) / (7.0 x 10^8 m)^2
a = 274 m/s^2
So the acceleration due to gravity on the surface of the sun is about 274 m/s^2.