do the math

(you) do the math

Figure out or put together the information for yourself. Do the math—can't you see that he's just using you to get ahead in the company? What happened? They convinced you to give them a lump sum as an "investment," and now they've cleared out of town. You do the math.
See also: math

do the math

1. Literally, to do a bit of arithmetic calculation. Primarily heard in US, South Africa. Well, let's just do the math to see if you have enough in your savings account to afford a new car.
2. To figure out or put together information for oneself. Primarily heard in US, South Africa. Do the math—can't you see that he's just using you to get ahead in the company?
See also: math

do the math!

work it out for yourself (used to suggest that the conclusion to be drawn about something is obvious). North American informal
Math is the American abbreviation of mathematics . When the phrase is used in British English, it is usually as do the maths .
2004 BBC News: Business I was faced with the choice of either topping up by using paid holiday or a vast reduction in earnings and a financial struggle when I least need it. You do the maths!
References in periodicals archive ?
To avoid this, do the math to see if there's a financially dominated plan that's always a worse deal.
The bottom line is, as studies have shown, most of us don't do the math before buying health insurance.
Our present leadership in Washington should get out their calculators (made in China), do the math and then stop the exodus.
So if you do the math, you will realize there are lots and lots of unused numbers.