> pww("matt", "3/2*2/1", nrow = 15, ncol = 9)
/ - - - - - - - - - \ 
| X X X     X X   X | 
| X X X     X X   X | 
|       X X     X   | 
|       X X     X   | 
| X X X     X X   X | 
| X X X     X X   X | 
| X X X     X X   X | 
|       X X     X   | 
| X X X     X X   X | 
| X X X     X X   X | 
|       X X     X   | 
|       X X     X   | 
| X X X     X X   X | 
| X X X     X X   X | 
| X X X     X X   X | 
\ - - - - - - - - - / 

