The phrase V + 기만 하면 되다 is a quintessential structure in the Korean language that encapsulates a sense of certainty. This means, when an action is performed, there's only one anticipated result. Depending on the situation, this pattern can be equated to English expressions like 'as long as you V', 'you merely need to V', or 'no sooner do you V than...'.
Understanding and effectively using the '기만 하면 되다' construction can make your Korean communication clearer and more nuanced, especially when conveying certainty or simplicity in actions leading to outcomes. As with any grammar pattern, frequent practice and exposure will make its usage second nature.