What result do you expect if this program calculated the square root of 4.000000e+6 ?
You should expect 2.0000e+3 or so: five places of precision.
In fact, SPIM prints out a 25 digit answer. Most of the digits are meaningless.
You have reached the end this chapter. You may wish to root among the following topics. Click on a subject that interests you to go to where it was discussed.