Quick Answer
Cake Flour does not use the same grams-to-cups value as every other ingredient. Using a practical US cup reference, 114 grams of cake flour is about 1 cup.
That means 100 grams of cake flour is about 0.88 cups, while 200 grams is about 1.75 cups.
Cake flour is finely milled and lighter than all-purpose flour, so the same cup volume holds fewer grams.