1  2  3  4  5  9  8  6  7

220 * (1/4) =   55 = A1
220 * (2/4) = 110 = A2
220 * (3/4) = 165 = approximately E3 (164.8)
220 * (4/4) = 220 = A3
220 * (5/4) = 275 = approximately C♯4/D♭4 (277.2) 
220 * (6/4) = 330 = approximately E4  (329.6)
220 * (7/4) = 385 = approximately G4  (392.0) 
220 * (8/4) = 440 = A4
220 * (9/4) = 495 = approximately B4  (493.9) 
Exact frequencies (such as 277.2) are from Wikipedia’s Piano key frequencies.
“It may be quite simple, but now that it’s done….“