Jacob is trying to eat less than 1800 calories a day. If he eats 400 calories for breakfast, 900 calories for lunch, and 1100 calories for dinner, how many more calories did he eat than he planned?
First add up the calories from all three meals: 900 + 400 + 1100 = <<900+400+1100=2400>>2400
Then subtract Jacob's goal from the number of calories he actually ate: 2400 - 1800 = <<2400-1800=600>>600
#### 600