IKMC 2027 - Grades 1-2 - Self-study SET 2 - Thematic Batch 3 Question 4

Alice has 7 pieces of paper: 3 white, 2 black and 2 grey. Ben cuts each non-black piece into 2 smaller pieces. Then Charlie cuts each non-white piece into 2 smaller pieces. How many pieces are there in total at the end?