Two photographs of the moon were taken at precisely the same time from two locations. The lunar angles of elevation at city A and at city B were measured as 53.6989° and 53.7425°, respectively. The two cities are 399 kilometers apart. Calculate the distance to the moon from city A on this day, and compare it with the actual value of 406,000 kilometers. Disregard the curvature of Earth in this calculation.
