This is the 5475th most frequent Korean word.
많기
The word "많기" is a noun form meaning "being many" or "much" in quantity.
많기 is used to describe the cause of the insufficiency, indicating a large number of attendees.
오늘 참여한 사람들이 많기 때문에 준비한 자리가 부족합니다.
There are many people attending today, so the prepared seating is insufficient.
많기 is used to describe the intensity of rain, emphasizing a great amount.
비가 많기 일주일 내내 그친 적이 없습니다.
It has rained so much that it hasn't stopped for an entire week.
많기 is used to explain the reason for the convenience in this context due to the abundance of resources.