Squares Level 3: 3d center stack (digits 1-5). center-window pre-training. 1. Locate center stackCenter window of 132 times 1321. Locate center stackUse every digit pair whose positions meet in the middle.132times1321x12 pairs3 pairs2 pairs2x2Active multiplication train windowcenter windowUse every digit pair whose positions meet in the middle.2. Add highlighted pairs2. Add highlighted pairs132times1321x12 pairs3 pairs132 pairs2x2Active multiplication train windowcenter window totalcenter -> 131 x 2 + 3 x 3 + 2 x 1 = 13.3. Read center total3. Read center totalCenter window answerCenter window = 13.
