`√40.96 + √0.4096 + √0.004096 + √0.00004096` `= √4096/100 + √4096/10000 + √4096/1000000 + √4096/100000000` `= ((64/10 + 64/100 + 64/1000 + 64/10000))` `= (6.4 + .64 + .064 + .0064)` `= 7.1104`