with the help of; by means of
Задача может быть решена при помощи логики.
The problem can be solved using logic.
Значит, ты поссорилась с мужем и решила проучить его при помощи меня?
So, you had a fight with your husband and decided to teach him a lesson by using me?
— Москва слезам не верит (1980)
Их спасли при помощи вертолёта.
They were rescued by helicopter.