#include <natural.h>
#include <hopper.h>
main:
   get a matrix of '5,2' integer random numbers, remember it in 'first matrix' and put it with a newline
   get a matrix of '2,3' integer random numbers, remember it in 'second matrix' and put it with a newline
   now take 'first matrix', and take 'second matrix', and multiply it; then, print with a new line.
exit(0)