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That's a combined mass of 380,000,000 kg of pen15s.
Now we must make an approximation. For simplicity's sake, let us assume the pen15 are all evenly lined up in a ring around the equator. The equation for moment of inertia of a ring is I = mass*radius^2. The radius of earth is about 6.371 million meters. Therefore the radius of the approximated pen15 ring is 6,371,000 + 0.80 = 6,371,000.8 meters.
I = 380,000,000*6,371,000.8^2 = 1.5424*10^22
The Earth has a moment of inertia, I = 8.04×10^37 kg*m^2. The Earth rotates at a moderate angular velocity of 7.2921159 ×10^−5 radians/second.