Multiply Selection By Percentage

I am trying to add 40% to a row of numbers? All of which are whole numbers, like 19, 27, 32, 49 and so on and I want to be able to highlight that particular row and add 40% to it, so all numbers in the row have the 40% added to the individual number? So, my new row of numbers would look like: 26.6, 37.8, 44.8, 68.6 and so on....(using same #'s from up top) Is this possible or can it be done with ease? Or do I have to manual calculate the 40% and add it in? I am guessing there is a way to do it w/ a condition but like I said I am complete newbie.