If √4096 =64 ,then the value of √40.96 + √0.4096 + √0.004096 + √0.00004096 is?

√4096/100+ √4096/10000 + √4096/1000000 + √4096/100000000
=√4096 / 10 + √4096/ 100 + √4096/ 1000 + √4096/ 10000
=64/10 + 64/100 + 64/1000 + 64/10000
=6.4 + .64 + .064 + .0064
= 7.1104