Type in the 1800 first, then press the bottom left key once, then the key to the right of it twice. Then type MYAPPLE. Make sure it's all uppercase otherwise it says invalid number when you try to dial. If done correctly, then it'll dial 18006927753.
The pencil up top should only be "ABC" and not "123 ABC" or any of the other combinations of abc, 123 or the UP arrow.
That's the simple way, the other way is to have had memorized where each letter was while T9ing without looking ...