Squares Level 27: 4d square D1:7-9 (mid). multiplication window train. 1. Left Edge7564 squared equals 7564 times itself1. Left EdgeUse the highlighted left edge pair.7564times75647x7492 pairs3 pairs4 pairs3 pairs2 pairs4x4Active multiplication train windowraw windowsraw -> 49 | _ | _ | _ | _ | _ | _Use the highlighted left edge pair. Carry waits for settle.2. 2-Pair Window2. 2-Pair WindowAdd both highlighted pairs.7564times75647x7492 pairs703 pairs4 pairs3 pairs2 pairs4x4Active multiplication train windowraw windowsraw -> 49 | 70 | _ | _ | _ | _ | _Add both highlighted pairs. Carry waits for settle.3. 3-Pair Window3. 3-Pair WindowAdd all 3 highlighted pairs.7564times75647x7492 pairs703 pairs1094 pairs3 pairs2 pairs4x4Active multiplication train windowraw windowsraw -> 49 | 70 | 109 | _ | _ | _ | _Add all 3 highlighted pairs. Carry waits for settle.4. 4-Pair Center4. 4-Pair CenterAdd all 4 highlighted pairs.7564times75647x7492 pairs703 pairs1094 pairs1163 pairs2 pairs4x4Active multiplication train windowraw windowsraw -> 49 | 70 | 109 | 116 | _ | _ | _Add all 4 highlighted pairs. Carry waits for settle.5. 3-Pair Right Window5. 3-Pair Right WindowAdd all 3 highlighted pairs.7564times75647x7492 pairs703 pairs1094 pairs1163 pairs762 pairs4x4Active multiplication train windowraw windowsraw -> 49 | 70 | 109 | 116 | 76 | _ | _Add all 3 highlighted pairs. Carry waits for settle.6. 2-Pair Right Window6. 2-Pair Right WindowAdd both highlighted pairs.7564times75647x7492 pairs703 pairs1094 pairs1163 pairs762 pairs484x4Active multiplication train windowraw windowsraw -> 49 | 70 | 109 | 116 | 76 | 48 | _Add both highlighted pairs. Carry waits for settle.7. 1-Pair Right Edge7. 1-Pair Right EdgeUse the highlighted right edge pair.7564times75647x7492 pairs703 pairs1094 pairs1163 pairs762 pairs484x416Active multiplication train windowraw windowsraw -> 49 | 70 | 109 | 116 | 76 | 48 | 16Use the highlighted right edge pair. Carry waits for settle.8. Settle strip8. Settle stripSettle once.Keep ones; carry moves left.raw windows49 | 70 | 109 | 116 | 76 | 48 | 16settled strip57 | 2 | 1 | 4 | 0 | 9 | 6Final multiplication answer49 | 70 | 109 | 116 | 76 | 48 | 16 -> 57214096.