You just found a bug in Google Calculator. You wrote "calories" but Google is giving you the answer in "kilocalories". If you change "calories" to "kilocalories" the answer doesn't change.
I wonder how many times in the past has it given you the wrong answer without you noticing?
I agree with the other person who replied to you. By 3000 calories I meant 3000 Calories, which is how people use it. My input is sloppy, Google turns its output into something rigorous.
As the other person replied, it is labelled precisely.
I wonder how many times in the past has it given you the wrong answer without you noticing?