Physics support beam?

Question

A steel beam is placed vertically in the basement of a building to keep the floor above from sagging. The load on the beam is 6 × 104 N, the length of the beam is 2.6 m, and the cross-sectional area of the beam is 7.5 × 10-3 m2. Find the vertical compression of the beam in mm

Answer 1

A 2.5 m long steel beam is placed vertically in the basement of a building. this is to ensure the floor as well the building above from sagging. the load on the beam is 5.8*10^4 N and the cross sectional area of the beam is 7.5*10^-3 m^2. what is the vertical compression of the beam ?