in round numbers meaning

• [American idiom]
  as an estimated number; a figure that has been rounded off.
  • Please tell me in round numbers what it'll cost.
  • I don't need the exact amount. Just give it to me in round figures.
  
• 
  [American slang]
  Fig. as an estimated number; a figure that has been rounded off. (Typically: be ~; express something ~; write something ~.)
    Please tell me in round numbers what it'll cost.
    I don't need the exact amount. Just give it to me in round figures.

• express sth in round numbers:    [American slang]Go ...
• by numbers:    (of a procedure, e ...
• by the numbers:    [American idiom]ac ...

Examples

1. In round numbers, only one in three of those testing positive are actually drug-users.
2. That's a swing, in round numbers, of $ 334 billion for this year alone.
3. Answer is $ 3, 333 and some cents-say $ 3, 000 in round numbers.
4. In round numbers, fatal accidents divide evenly among three categories : head-on, side impact and rollover.
5. So in round numbers, it's an immediate 8 percent increase in sales for the retailer,"