Correct

妙用

/ miào yòng / 
Strokes

Definition

magical effect

Example

As a Verb

ingeniously use

1
Shànyú
善于
miào
妙
yòng
用
sì
四
zì
字
chéngyǔ
成语

be good at using four-character idioms

As a Noun

magical/marvellous effect

2
Jìsuànjī
计算机
dà
大
yǒu
有
miàoyòng
妙用
  
。

The computer can work miracles/wonders.