This is interesting. From my memory of basic physics, gravitational pull is directly proportional to mass (seven times the mass, 7 times the pull), and inversely proportional to the square of the distance from center of mass to center of mass [2.6 times the radius = 1/(2.6 squared)]. This calculates out to a surface gravity of 84% of Earth gravity. So, actually somewhat less than Earth's!
The previous Aarchaeus made a math mistake. His equation is all right, but he should have come up with 1.035, or 3-1/2 percent more than Earth’s gravity. My twin bro is sorta careless sometimes.