To calculate the total number of tiles needed to cover the kitchen floor, you multiply the number of rows by the number of tiles per row:

$\text{Total tiles} = 18 \, \text{rows} \times 23 \, \text{tiles per row}$

$\text{Total tiles} = 414$

So, 414 tiles are needed to cover the floor.

Would you like further details on this, or do you have any other questions?

Here are some related questions for further practice:

1. If each tile is 1 square foot, what is the total area covered by the tiles?
2. What if there are only 17 rows of 23 tiles? How many tiles would you need?
3. How many tiles would you need if each row had 25 tiles instead of 23?
4. If 5 tiles break during installation, how many tiles will you need to buy to complete the floor?
5. What is the perimeter of the floor if each tile is 1 foot long and wide?

Tip: When calculating totals involving repeated rows or columns, always multiply the two numbers to get the answer!