Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
In a house of 15, 3/5 of the people eat pizza. If Aviana brought pizza with 50 pieces, and each person eating pizza took 4 pieces, calculate the number of pizza pieces that remained.

### Response:
If there are 15 people living in the house, the number of people eating pizza is 3/5*15 = <<15*3/5=9>>9 people.
If each house member who eats pizza took four pieces to eat, the number of pieces taken is 4*9 = <<4*9=36>>36 pieces.
Since the total number of pieces was 50, the number of pieces not taken is 50-36 = <<50-36=14>>14 pieces.
#### 14