Write a program that prints an n (the number of rows from 1 to n)
by m (the number of columns from 1 to m) multiplication
table. For example, table(4,5) might produce:
* | 1 2 3 4 5
--+---------------
1 | 1 2 3 4 5
2 | 2 4 6 8 10
3 | 3 6 9 12 15
4 | 4 8 12 16 20