Correct

趁手

/ chèn shǒu / 
Strokes

Example

As an Adverb

conveniently (when doing sth); without extra trouble

1
Nǐ
你
líkāi
离开
shí
时
  
,
qǐng
请
chènshǒu
趁手
bǎ
把
mén
门
dài
带
shàng
上
  
。

Please close/shut the door when you leave.