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

# Answer

600
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
600
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?
train