For one, we live in country where cell phones are now being used by 91% of adults, according to the survey conducted between April 17 and May 19 of 2,252 adults. You could have just taken your phone out of your pocket and just looked it up. For two (and this is probably the answer your teacher is looking for), 121323 is much bigger than what she figured the product to be, so there is no possible way that her answer is right.