Chengyu usage loop
事半功倍
half the effort, twice the result. Learn the modern situation first; the old story is useful only after the idiom has a job.
half the effort, twice the result
Situation first
half the effort, twice the resultA chengyu is a compressed judgment about a situation. Random idiom sprinkling is how learners sound like a proverb calendar.
Reading supports
Use these after the first listen. Pinyin is scaffolding; English is context; neither should become a sofa.
Literal meaning
half the effort, twice the result
Story
This page focuses on the modern use of 事半功倍, not just the old story.
Modern usage
Use 事半功倍 in work contexts when the situation matches the meaning: half the effort, twice the result.