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

### Instruction:
Ryan is considering buying a new multivitamin brand.  Each pill has 50 mg of Vitamin A in it.  The recommended daily serving of Vitamin A is 200 mg.  How many pills does Ryan need to hit the recommended amount for the week?

### Response:
 ปริมาณที่ใช้ใน 7 วัน: 7 x 200 = <<7*200=1400>>1400 มิลลิกรัม
1400/50 = <<1400/50=28>>28 เม็ด