Lelejia's kitchen is a rectangle with a length of 4 meters and a width of 36 decimeters. How many tiles do you need if you lay a floor tile with a side length of 4 decimeters? The price of each tile is 7 yuan. How much does it cost to lay a good kitchen floor?

Lelejia's kitchen is a rectangle with a length of 4 meters and a width of 36 decimeters. How many tiles do you need if you lay a floor tile with a side length of 4 decimeters? The price of each tile is 7 yuan. How much does it cost to lay a good kitchen floor?

36/4=9
4m = 40m
40/4=10
10 × 9 = 90 pieces
90 × 7 = 630 yuan