I'm having trouble with a couple of homework problems concerning calculating deltaE.

There are 3 problems, and I got one out of three correct, so I don't know what I'm doing wrong.

a). A system releases 363 kJ of heat to the surroundings and does 2.0e+02 kJ of work on the surroundings;

So I did (-363) - (2e^2) = -377.7781122

and

b). q = 5.62 kJ and w = -495 J

So I converted -495 K to -.495 kJ, and did 5.62 - (-.425) = 6.115

Any ideas as to where I'm going wrong?