Tom’s cat is 8 years old.  His rabbit is half the age of his cat.  His dog is three times as old as his rabbit.  How old is the dog?
How old is Tom’s rabbit? ** Tom’s rabbit is 8 / 2 = <<8/2=4>>4 years old.
How old is Tom’s dog? ** His dog is 4 x 3 = <<4*3=12>>12 years old.
#### 12