Logic Question pls answer assignment. helllppppppp

In samonte's kitchen there was 3 tin cans, Each cans contans 3 cakes.

One night Alexander crept into the kitchen, opened the 3 cans and ate 3 cakes, the surprising thing was,when alexander went back to bed, each cans is still contained with 3 cakes, what did he do?



He didn't ate the cakes from the cans...
The cakes are maybe from other place, not in the cans...
The cans are opened but the cakes inside it are untouched...
1 3 1