# Qiskit textbook: mod 15 multiplication circuit

The Qiskit textbook shows a circuit for mod 15 multiplication by "a", which for a==2 does the following operations:

U.swap(0,1)
U.swap(1,2)
U.swap(2,3)


But this is equivalent to a circular right-shift by 1 which is division (not multiplication) by 2.
What am I missing?