A constant force ${\mathbf F} = -6 {\mathbf i} + 3 {\mathbf j} - 7 {\mathbf k}$ moves an object along a straight line from point $(5, 8, 1)$ to point $(3, -2, 9)$.

Find the work done if the distance is measured in meters and the magnitude of the force is measured in newtons.

Work: Nm