What is square root 40 in simplified form?

6.4 rounded to the nearest decimal : ) 

It would be 6.3 simplified .  but the original form would be 6.3245553204 so that simplified to the nearest tenth would be 6.3 . u know what i mean jelly bean? u would start with the 5 since its the largest number so 5 to the nearest 5 is 6 so it would be 6.324666 and then do that with all the fives so knock the rest down so its just 6 and then its 6.3246 and so 4 would turn to a 5 and then it would be 6.325 and then 2 would be a 3  and then it would be 6.33 and its just 6.3