Use long division:
2 | 3 | 7 | 8 | 2
23 goes into 78 at most 3 times:
| | | 3 | |
2 | 3 | 7 | 8 | 2 |
| - | 6 | 9 | |
| | | 9 | 2 |
23 goes into 92 at most 4 times:
Answer: |
| | | | 3 | 4 |
2 | 3 | 7 | 8 | 2 |
| - | 6 | 9 | |
| | | 9 | 2 |
| | - | 9 | 2 |
| | | | 0 |