Let's learn about "가성비"

가성비 : cost-effectiveness

ex)

A) 이 제품 가성비가 무지 좋아. 싸면서도 기능도 많고 품질도 좋고 게다가 고장도 잘 안 나 ; This product is very cost-effective. It's cheap, it has many functions, it's high quality, and it doesn't break down easily

* 제품 : product

* 싸다 : be inexpensive

* 싼 : inexpensive

* 기능 : function

* 무지 : [=엄청] too much

* 많은 : many; much; a lot

* 많다 : be a lot

* 품질 : quality

* 좋은 : good

* 좋다 : be good

* 좋고 : 좋다 + -고(and)

* 게다가 : moreover; in addition

* 고장 : breakdown; trouble; failure

* 안  : a word makes a verb negative; not

* 나다 : (1) sprout; grow (2) happen; break out (3) occur

B) 정말! 그럼. 나도 하나 사야겠네 : Really! Of course. I should buy one, too

* 정말 : [=정말로] really

* 그럼 : then; of course

* 나도 : 나(I) + -도(too)

* 하나 : one (piece / product / item ...)

* 사다 : buy

* 사야겠다 : 사다 + -야겠다(should; have to)