The result of your conversion between megacalorie [I.T.] and megawatthour appears here
To convert between Megacalorie [I.T.] and Megawatthour you have to do the following:
First divide 4186800 / 3.6e+09 = 0.001163
Then multiply the amount of Megacalorie [I.T.] you want to convert to Megawatthour, use the chart below to guide you.