A 78n cube iron block is placed in the center of the 0.5m square meter horizontal table top, and the pressure of the iron block on the table top is calculated +98

A 78n cube iron block is placed in the center of the 0.5m square meter horizontal table top, and the pressure of the iron block on the table top is calculated +98

78n iron mass = 7.8kg
The iron density is 7.8 * 10 ^ 3
Volume = 0.001 M3
The length of cube is 0.1M
Bottom area = 0.01 m2, so
Pressure = 78 / 0.01 = 7800pa
The first floor answer is wrong