用算盘计算to use an abacus

盘算to calculate

• 别总在小事上打算盘。

  Don't always calculate every little detail.

• 我知道你打的是什么算盘。

  I know what you're planning.

• 打错算盘

  miscalculate

• 你显然是打错了算盘。

  You've obviously made a miscalculation.