To understand what could happen, you need to understand NBBO (National Best Bid and Offer) which is the current price. The bid price is the current sell price and the ask is the current buy price. Let's assume that the NBBO quote is $227.00 x $227.25
If you are selling fewer shares than the size available at the bid price of $227.00 then your sell order is filled completely at $227.00 .
If you are selling more shares than available at the bid price of $227.00 then there are several possibilities. If you take out all of that bid volume, you'll get a partial fill. If additional buying comes in at your bid price (perhaps there's an iceberg order on the books) then you'll sell some more shares at $227.00 and you'll continue to get filled at that price. If no additional shares come in at the bid then you'll only get a partial fill and share price will drop. However, if you placed an AON (All Or None order) then no shares will be sold since the entire order could not be filled at $227.00 .
The liquidity at the moment is what determines how much (if any) of your order will be filled. If liquidity is high, you'll have no problem selling all of your stock at $227.00 . If liquidity is low, you'll have to either wait for sufficient liquidity or you'll have to sell shares incrementally, hoping that you can get $227.00 for unsold shares.
You will receive money for whatever number of shares are sold.