Solve the given question:
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 43-mm focal length camera lens. The picture shows the upper half of the president's body (or 3.3 ft of his total height). On the negative of the film, this part of his body is 18 mm high. How close was Kim to the president when she took the picture?
(In ft)
Show all work, use additional paper if necessary.