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

### Instruction:
Henrietta is repainting her house. The walls in the living room take up 600 square feet. She has three bedrooms. The walls in each bedroom take up 400 square feet. If one gallon of paint can cover 600 square feet, how many gallons of paint does Henrietta need to paint her house?

### Response:
The total square footage of the three bedrooms is 400 square feet per bedroom * 3 bedrooms = <<400*3=1200>>1200 square feet
The total square footage of the house is 1200 square feet + 600 square feet = <<1200+600=1800>>1800 square feet
Henrietta needs 1800 square feet * 1 gallon of paint per 600 square feet = <<1800*1/600=3>>3 gallons of paint
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