One Minute Challenge. Determine the product of Three matrices in one Minute

One Minute Challenge.
Can you Figure out Product of three 3X3 matrices in one Minute.
In Engineering entrance exam we are supposed to answer each question in One minute.
D=ABC
if Matrix D is the result of the product of 3 Matrices.
D(i,j)= Multiply row i of Matrix A with all Colomums of Matrix B. Then Multiply the resultant row with Coloum J of Matrix C.
We dont have to really multiply all the matrices as the examiners give the wrong anwers with random numbers.