On the house design drawing with the scale of 1: 100, Xiao Dan measured his own house, with a plane length of 16CM and a width of 8CM. Xiao Dan's father is ready.

16 cmx 100 = 16M 8 cmx 100 = 8M

16x8 = 128m2

0.8x0.8 = 0.64m2

128 divided by 0.64=200 (block)

About 200 such tiles are needed.