300 feet is 91.44 meters, or exactly 100 yards. If you picture the height as repeated 10-foot story-height intervals, it equals 30 intervals (300 ÷ 10 = 30). That gives a simple scale estimate of about 30 stories, but it is not a rule for counting floors: actual floor-to-floor heights vary by building and level.
A second illustration is 50 assumed six-foot person-heights stacked vertically (300 ÷ 6 = 50). This is a scale model, not a claim about average human height. For a precise building comparison, use its measured height and floor count rather than converting feet to floors with a fixed ratio.
For units, NIST's international foot is exactly 0.3048 meters: 300 × 0.3048 = 91.44 m. See NIST unit-conversion factors.