1) Addition von 3 und 3:

   3  +  3  =  6
   
   []   []   [][]   Zweimal wird
   [] + [] = [][]   die Zahl 3
   []   []   [][]   plusgenommen.

   
2) Multiplikation von 3 und 3:

   3  * 3  =  9

   []   []    [][][]  Dreimal wird
   [] * [] =  [][][]  die Zahl 3
   []   []    [][][]  plusgenommen.

   Der Unterschied zur Addition:

   3  * 3  =  3 +  3 +  3    =    9

   []   []    []   []   []      [][][]
   [] * [] =  [] + [] + []   =  [][][]  
   []   []    []   []   []      [][][]