insert value to listview from calculations

[malaysians]

Hello guys, I'm beginner of C# here.. I already make my project for my research study in data mining....The problem comes when I need to put the value into listview from my calculation...Its outputs that I get is 123456 in horizontal...which is supposely the output is 123456 in vertical..so, its means, the listview have 6 rows where first row = 1, second row = 2, and so on...i give the picture so you guys can get clear what i mean...

from this picture, i build two element which is richtextbox and listview....from my calculation, i get 123456 in vertical at richtextbox....but i get 123456 in horizontal at listview....my question is, how to make my listview get the same pattern result as richtextbox...it is possible??

thank you for spending ur time read my problem