Round to whole number

Hi,

Need help with rounding the numbers. I am working on a quote in which quantity is arrived by dividing the sell price by Total sell price. The condition is the result (quantity) should always be a whole number, I can achieve that by cell formatting but when the calculation is done using handheld calculator the results are different.

I need the result to be same if using excel or handheld device i.e quantity in whole number.