Multiplying number in a list in an order

[buran]

yeah, it's very neat and is optimized for such operations
from docs:

Deques are a generalization of stacks and queues (the name is pronounced “deck” and is short for “double-ended queue”). Deques support thread-safe, memory efficient appends and pops from either side of the deque with approximately the same O(1) performance in either direction.