Trial and error. The square root of 32 will be between 5 and 6, a little closer to 6. 5.5 is too low, 5.7 is too high. 5.657 works for me.
The square (not sqare) root is approx 23031.054
double root = Math.sqrt(XXXXX); where XXXXX is the number for which you want to calculate the square root.
3.60555127546398
12768.
1.772453850905516027298167483314
8.6023252670426267717294735350497
11.18
51
37
6.2449979983983982058468931209398
16
It is: 400