This is making me feel like an idiot. I'm given this answer for a question but I don't understand it.
$$y =\rm (-12.9\, m/s)(3.27\, s) + 1/2(9.81\, m/s^2)(3.27\, s)^2 = 105\, m = 0.11\, km$$
I punch these numbers into the calculator but I'm not getting $\rm105\, m$ but instead I'm getting $\rm(-42.183) + (52.449) = 10.266\, m$.
Whether by hand, by calculator or by Wolfram Alpha, it is clear that your calculation is correct.
My guess is that there is a typo or misprint in the answer provided in your linked document.