Matrix Multiplication

Two matrices of size 2x2 are multiplied as shown below. Find the integers , , , in the resultant matrix.

[1  2 ]   x     [4  5 ]      [A  B]
[2  3 ]         [7  8 ]   =  [C  D] 

In the text box below, enter each of the four integers, , , , on a new line.