<human>:  John puts $25 in his piggy bank every month for 2 years to save up for a vacation. He had to spend $400 from his piggy bank savings last week to repair his car. How many dollars are left in his piggy bank?
<bot>: How many months did John save money for? ** He saved money for 2 years, which is equal to 12 x 2 = <<12*2=24>>24 months.
How much money did John save? ** The amount of money he saved is $25*24 = $<<25*24=600>>600.
How many dollars are left in his piggy bank? ** But he spent some money so there is $600 - $400 = <<600-400=200>>200 left.
#### 200