human
Joseph gave 23 cards to each of his 15 students and had 12 cards left. How many cards did Joseph have at first?
assistant
How many cards did Joseph give to his students? ** He gave 23 cards each to 15 students for a total of 23*15 = <<23*15=345>>345 cards
How many cards did Joseph have at first? ** He has 12 cards left, so originally the number of cards was 345+12 = 357 cards
#### 357