Correct

快刀切豆腐

/ kuài dāo qiē dòu fǔ / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/快刀切豆腐-Chinese-idioms-Cchatty-8aefe43c-964f-465b-9a83-d84cfa65ac93-1612777072.jpg

Collocation

1
就像快刀切豆腐
2
快刀切豆腐地……
3
他快刀切豆腐,迅速……(处理某事)
4
快刀切豆腐,一下子解决问题

Definition

快刀切豆腐

Literally means:

a sharp knife cuts Tofu

Actually means:

solve a problem efficiently

It means settling a problem decidedly and efficiently.

千净利落指办事果断,干净利落。

Example

Used as a minor sentence, predicate, adverbial adjunct or object. (作小句、谓语、状语、宾语)
1
Kuàidāo
快刀
qiē
切
dòufu
豆腐
  
,
tā
他
yī
一
xiàzi
下子
jiějué
解决
le
了
gōngrén
工人
ná
拿
bù
不
dào
到
gōngzī
工资
de
的
wèntí
问题
  
,
gōngrén
工人
men
们
pāishǒuchènkuài
拍手称快
  
。

Cut tofu quickly, he suddenly solved the problem that the workers can not get paid, the workers clapped their hands and said fast.

2
Jìrán
既然
shàngmiàn
上面
yǐjīng
已经
tóngyì
同意
zhuābǔ
抓捕
zhège
这个
dàrenwù
大人物
  
,
wǒmen
我们
jiù
就
kuàidāo
快刀
qiē
切
dòufu
豆腐
  
,
lìkè
立刻
dòngshǒu
动手
bā
吧
  
,
yǐmiǎn
以免
qíngkuàng
情况
yòu
又
fāshēng
发生
biànhuà
变化
  
。

Now that the above has agreed to arrest this "big man", we will quickly cut tofu, immediately, so as not to change the situation.

3
Tā
她
cóngxiǎo
从小
jiù
就
dá
打
pīngpāngqiú
乒乓球
  
,
jìshù
技术
hǎo
好
  
,
jīngyàn
经验
duō
多
  
,
suǒyǐ
所以
cái
才
néng
能
kuàidāo
快刀
qiē
切
dòufu
豆腐
dì
地
dǎbài
打败
le
了
suǒyǒu
所有
de
的
duìshǒu
对手
  
,
duóqǔ
夺取
le
了
shìjiè
世界
guànjūn
冠军
  
。

She played table tennis from an young level, good technology, experience, so she was able to quickly cut tofu to beat all the opponents, won the world championship.