Final answer:
To find the volume of the building, you would multiply the length, width, and height together, but the height is not provided in the question.
Step-by-step explanation:
To calculate the volume of an office building, you would use the formula for the volume of a rectangular prism, which is length × width × height. In this case, the building has a length of 140 feet and a width of 100 feet. However, as the question does not provide the height of the building, we can only provide the formula and explain that the volume would be calculated by multiplying the provided dimensions with the height, once known.