Answer:
Taking into account the values showed for this food (image attached). It is required 
5 
Servings. 
Explanation:
The total calcium (Cat) required is 1300 mg/day. 
One serving of this food can have 260 mg. 
First step is to suppose one day of calculation. t = 1 day. 
Cat = (1300 mg/day)(1 day) = 1300 mg Calcium. 
One single serving can have 260 mg Calcium (Cas). So, we need to calculate the amount of servings (N) required to complete 1300 mg. 
Cat = Cas*N 
N = Cat/Cas = 1300 mg/260mg 
N = 5. 
Finally amount of servings is five N = 5.