An An lives on the 7th floor, so his balcony is 6 stories high from the ground, and each floor is 4 meters high, so the height of Miss Li's balcony from the ground is 4× 6 = 24 meters.

Primary school mathematics is to teach children a series of knowledge about number, four operations, the calculation formula of figure and length, unit conversion and so on through textbooks, which lays a good mathematical foundation for junior high school and daily life calculation.