计算

The machine automatically counts how many people have used it.

I'm out in my calculation.

calculating device

calculation error

computation speed

be counted by thousands

base one's calculation on the latest statistics

express in percentage terms

make a rough/careful calculation; calculate roughly/carefully

art of computation

be out in one's calculations; compute erroneously

defy calculation

carry out calculations

calculate the weight

take count of votes; count the votes/ballots

count/reckon the days

compute the average

count one's profits

calculate/reckon the cost

We shouldn't do anything without a plan.

cannot make ends meet in spite of careful arrangement/planning of one's household expenses

be adept at planning

be not good at planning

secretly plot/scheme against others