Surface area of a cube with edge 3m

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply

What is the solution for 6 - 7/8? explain the steps.