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

### Instruction:
Isabel has some money in her piggy bank. She spent half the amount and bought a toy. She then spent half of the remaining money and bought her brother a book. If she has $51 left, how much money, in dollars, did she have at first?

### Response:
 หลังจากซื้อของเล่นแล้ว อิซาเบลเหลือเงิน 51*2=<<51*2=102>>102 ดอลลาร์
อิซาเบลมีเงินเริ่มต้น 102*2=<<102*2=204>>204 ดอลลาร์