407 kcal day

Haven't eaten all day and just been given 4 fish fingers and half a tin of beans for dinner - a total of 407 calories. We have nothing else in the house that I can eat and I have no money to go and get something else. I'm so hungry. 😭
I know none of you can help, I just needed to rant because I feel nauseated and lightheaded due to lack of food.