[USER (data scientist)]: That's great! What about setting macronutrient goals for them? Please generate a tuple to represent the macronutrient goals (protein, carbohydrate, and fat calories) based on a given daily calorie goal in the 'fastfood' DataFrame.
My template of code snippet is:

---BEGIN CODE TEMPLATE--- 

import pandas as pd
import pickle

# Read the fastfood data 
fastfood = pd.read_csv("fastfood.csv")  

# YOUR SOLUTION BEGIN:
<code1>
[GENERATE YOUR CODE]
</code1>
# YOUR SOLUTION END: 

print(fastfood)
pickle.dump(fastfood,open("./pred_result/fastfood.pkl","wb"))

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure thing! We can set macronutrient goals as a percentage of their daily calorie intake. Here's a Python function that takes the daily calorie goal and gives you the macronutrient goals: 
