Question 290705
a box has 6 sides with surfaces
they come in 3 pairs
top, bottom and sides
2*6*4 
2*4*8
2*6*8
work those out and add them
2*6*4+2*4*8+2*6*8

2*(6*4+4*8+6*8)
2*(24+32+48)
2*(104)
208 ft^2