This is hilarious, really! Try it out yourself... 1. Open ms calculator 2. Get Square root of 4 (by pressing 4 then sqrt button) 3. It will show 2. Not subtract 2 from that (By pressing - button than 2) and watch the magic after hitting the = button Here's a video too: http://www.youtube.com/watch?v=J2cQQP4nHnA Don't you think this is something weird about Microsoft? bk...

There's nothing weird or wrong about MS here. Its simple. You press 4 and hit the sqrt button which gives 2. As far the calculation is concerned, it is over. Beginning to use the "-" sign is a new calculation

I was expecting to see S written when I press '=' It's still a bit messed up on why it would do that.

i can't even remember the day when i last used the built-in calculator in win, i'm always using hexelon max, it kicks ass

That's normal actualy, and it happens inside your processor, and the error is propagated into many other applications if not treated (ex. in Flash (4.35-4)*100=34.999999999). It's because the numbers are represented in floating point.

It is not -8.164 (ignoring the rest of the numbers). It is -8.164e-39. Basically that is 0.0(insert lots and lots of zeros)8164 It is probably caused by some memory overflow in the square root calculation (not sure but am taking a guess why the number is not zero but very close to it). You can see a very similar thing in the scientific calculator. click View then Scientific. It does not have (on XP version anyway) have a sqrt button here, but it does have an x^y (or x to the power of y). Put in 4, hit that button, hit 0.5 and click = Answer is 2 (4 to the power of .5). Now extract 2 and you get 1.06e-38. How many zeros is that? Probably the same in the US national debt. Ok, maths lesson over. That's enough work evasion therapy.

The Result is: 0,0000000000000000000000000000000000000081648465955514287168521180122928 Not 100% Correct, but Around 99,999999999999999999999999999999% right i would assume