Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 John is laying the foundation for 3 homes. Each home needs a slab of concrete that is 100 feet by 100 feet by .5 feet. Concrete has a density of 150 pounds per cubic foot. A pound of concrete cost $.02 per pound. How much does the foundation cost?


### Response:
 Le volume de la dalle est de 100*100*.5=<<100*100*.5=5000>>5000 pieds cubes
Donc, le poids est de 5000*150=<<5000*150=750000>>750000 livres
Cela signifie que le coût est de 750000*0.02=$15000
Donc, le coût total est de $15000*3=$<<15000*3=45000>>45000