Verified answer

It would help if all the periods and bracketing were placed in the proper place. But here is what I believe you meant to do:

[261.6 / (630*4) x (104.4*102)] - (3.6*103.4*103) = (0.1038095*10648.8) - 38,340.72 = 1,105.4466 - 38,340.72 = -37,235.274