Using the right tool yields twice the result for half the effort.
Tips
history
From 《孟子·公孙丑上》: 'doing half what the ancients did, the effect is bound to be double' - Mencius's take on why acting at the right moment multiplies results.
mistakes
Opposite of 事倍功半 ('double effort, half result'). Students often swap them - the lucky one is 事半 (less work) 功倍 (more result).