First, we define a base 26 counting system:
A=1 B=2 C=3 ... W=23 X=24 Y=25
Z=0
(This is my favorite such scheme.)
Next, we calculate the values of the individual words:
DEATH = 4 5 1 20 8 = 4x26^4 + 5x26^3 + 1x26^2 + 20x26 + 8 = 1916988
CHOCOLATE = 3 8 15 3 15 12 1 20 5 = 3x26^8 + 8x26^7 + 15x26^6 + 3x26^5 + 15x26^4 + 12x26^3 + 1x26^2 + 20x26 + 5 = 695412122657
Then we multiply the two numbers together:
1916988 x 695412122657 = 1333096694187997116
And convert back to base 26:
13 13 M 363 25 Y 9443 5 E 245528 10 J 6383735 7 G 165977116 6 F 4315405031 15 O 112200530829 23 W 2917213801573 19 S 75847558840919 21 U 1972036529863901 7 G 51272949776461427 1 A 1333096694187997116 14 N
(This process starts at the bottom, with each number being divided by 26, the quotient written above it and the remainder to the right.)
Thus, DEATH x CHOCOLATE = MYEJGFOWSUGAN
which is an anagram of FOGGY MENU JAWS.
Sooooo... there you have it.