Abuilding in san francisco is shaped like a square pyramid it has a slant height og 856.1 feet and each side of its base is 145 feel long find the lateral area of the building

We know that

for a Square Pyramid
[lateral area]=4*[a*s/2]> 2aS
where
a  is the length side of the square base
S is the slant height
a=145 ft
S=856.1 ft
[lateral area]=2*145*856.1> 248269 ft²

the answer is 248269 ft²