Multiplication with in a double arrray

Hi, this is my first question so go easy on me please I am a new Matlab user.

I have searched arround the help section and cannot seem to find the answer I am after.

I have some numerical data in a 4096x2 double array and I would like to multiply each cell by another cell in the array to make a new cell and turn the array into a 4096x3 array.

Eg.

A1=1 B1=1 C1=A1*B1

A2=2 B2=2 C2=A2*B2

A3=3 B3=3 C2=A3*B3

Thanks in advance for the help

[KALYAN ACHARJYA]

A=[1 2 3 4];
B=[5 6 7 8];
C=A.*B 

Answer 1

[James Tursa]

M = your 4096x2 double matrix
M(:,3) = M(:,1) .* M(:,2);

[Jonathan Drane]

James, Thanks so much for this answer it works exaclty as required.

Answer 2

[madhan ravi]

Wanted = [A,B,A.*B]