匡算

jìn xíng chū bù kuāng suàn

进行初步匡算

give a preliminary estimate

jù chū bù kuāng suàn jīn nián mián hua jiāng zēng chǎn bǎi fēn zhī èr

据初步匡算，今年棉花将增产百分之二。

According to an rough estimate, cotton output will go up by 2 percent this year.