How can I gain weight in one week?

Hajar_Whitestone
My weight is around 45 or +, my Heigh is 5'7 inches, I eat but I don't play any sports, I sleep as much as I can, but still I don't gain any weight, I can eat anything and my weight would be around 47, My dream is 70 KG
How can I gain weight in one week?
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