The Animal Calculator is an incredibly cute and well made calculator. The Animal Calculator displays up to 8 digits on the LCD display. To see the LCD display, you simply need to push on the right wing. If you leave the Animal Calculator unused for 5 minutes then the LCD display will automatically turn off.
According to experts, the general consensus is that dogs mature faster than humans, reaching the equivalent of 21 years in only two, and then aging slows down to more like four human years per year. "Dog Whisperer" Cesar Millan’s site recommends this way to calculate your dog’s human-age equivalent: Subtract two from the age, multiply that by four and add 21.