<human>:  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?
<bot>: How much money was left after Isabel bought the toy? ** After buying the toy, Isabel has 51*2=<<51*2=102>>102 dollars left.
How much money did she have at first? ** Isabel had 102*2=<<102*2=204>>204 dollars at first.
#### 204