이렇게 = in this way; like this; this (much/many), so (much/many);
- 이렇게 많은 돈을 어디서 났어? = Where did you get so/this much money?
- 날씨가 이렇게 더운 적은 없었다 = The weather has never been so hot (as hot as this).
- 이 문을 열려면 이걸 이렇게 누르면 돼 = You can push this thing like this to open this door.
Here are the most basic 이, 저, 그 phrases. It's good to learn them together.
- 이(this), 이러하다/이렇다 (a: is this way), 이러한/이런(a: this (modifier)), 이러하게/이렇게 (adv),
- 저(that), 저러하다/저렇다 (a: is this way), 저러한/저런(a: that (modifier)), 저러하게/저렇게 (adv),
- 그(that), 그러하다/그렇다 (a: is like so/that), 그러한/그런(a: such (modifier)), 그러하게/그렇게 (adv),