tā / shú liàn / de / jì suàn / chéng chú / suǒ yǐ / kǎo shì / qǔ dé / le / hǎo / chéng jì

他熟练地计算乘除，所以考试取得了好成绩。

He calculated multiplication and division skillfully, so he got good grades in the exam.