Mike changes tires on different vehicles.  He changes all the tires on 12 motorcycles and all the tires on 10 cars.  How many tires did he change?
He changed 12*2=<<12*2=24>>24 motorcycle tires
He changed 10*4=<<10*4=40>>40 car tires
So he changed 24+40=<<24+40=64>>64 total tires
#### 64
human
Mike changes tires on different vehicles.  He changes all the tires on 12 motorcycles and all the tires on 10 cars.  How many tires did he change?
gpt
He changed 12*2=<<12*2=24>>24 motorcycle tires
He changed 10*4=<<10*4=40>>40 car tires
So he changed 24+40=<<24+40=64>>64 total tires
#### 64