2 sentences

1. 如果他再敢骗我，我一定会找他算账。

   rú​guǒ tā zài gǎn piàn wǒ, wǒ yī​dìng huì zhǎo tā suàn​zhàng.

   If he dares to lie to me again, I will definitely settle the score with him.

   Source: Dong Chinese Dictionary

2. 他正在办公室里算账，核对这个月的开支。

   tā zhèng​zài bàn​gōng​shì lǐ suàn​zhàng, hé​duì zhè​ge yuè de kāi​zhī.

   He is in the office doing the accounts, checking this month's expenses.

   Source: Dong Chinese Dictionary