1)360 (400*.9)
2)342 (380*.9)
3)119 (140*.85)
4)28 (35*.8)
In this case, you just multiply the expression under the root that gave the greatest integer (as you pull the square root of that number). See how I did: 4 multiplied by 31, which gives 124 then pull out the square root of 4, because 31 can not be, because it is a prime number and root would be an irrational number.