I need some help getting started multiplying matrices.

This is the pseudocode i am given.

Code:
int main(int argc, char **argv) {
step 1: check if the command line arguments are passed correctly
step 2: read the first matrix from file and store it in an array
step 3: read the second matrix from file and store it in an array
step 4: check if the two matrices are multiplicable
step 5: multiply the two matrices and store the product in an array
step 6: print out the product in readable format
} /* main() */
I know you arent supposed to do my hw but can you get me started?