Squares Level 22: 4d square digits 1-3. multiplication window train. 1. Left Edge1231 squared equals 1231 times itself1. Left EdgeUse the highlighted left edge pair.1231times12311x112 pairs3 pairs4 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 1 | _ | _ | _ | _ | _ | _Use the highlighted left edge pair.2. 2-Pair Window2. 2-Pair WindowAdd both highlighted pairs.1231times12311x112 pairs43 pairs4 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 1 | 4 | _ | _ | _ | _ | _Add both highlighted pairs.3. 3-Pair Window3. 3-Pair WindowAdd all 3 highlighted pairs.1231times12311x112 pairs43 pairs104 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 1 | 4 | 10 | _ | _ | _ | _Add all 3 highlighted pairs. Carry waits for settle.4. 4-Pair Center4. 4-Pair CenterAdd all 4 highlighted pairs.1231times12311x112 pairs43 pairs104 pairs143 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 1 | 4 | 10 | 14 | _ | _ | _Add all 4 highlighted pairs. Carry waits for settle.5. 3-Pair Right Window5. 3-Pair Right WindowAdd all 3 highlighted pairs.1231times12311x112 pairs43 pairs104 pairs143 pairs132 pairs1x1Active multiplication train windowraw windowsraw -> 1 | 4 | 10 | 14 | 13 | _ | _Add all 3 highlighted pairs. Carry waits for settle.6. 2-Pair Right Window6. 2-Pair Right WindowAdd both highlighted pairs.1231times12311x112 pairs43 pairs104 pairs143 pairs132 pairs61x1Active multiplication train windowraw windowsraw -> 1 | 4 | 10 | 14 | 13 | 6 | _Add both highlighted pairs.7. 1-Pair Right Edge7. 1-Pair Right EdgeUse the highlighted right edge pair.1231times12311x112 pairs43 pairs104 pairs143 pairs132 pairs61x11Active multiplication train windowraw windowsraw -> 1 | 4 | 10 | 14 | 13 | 6 | 1Use the highlighted right edge pair.8. Settle strip8. Settle stripSettle once.Keep ones; carry moves left.raw windows1 | 4 | 10 | 14 | 13 | 6 | 1settled strip1 | 5 | 1 | 5 | 3 | 6 | 1Final multiplication answer1 | 4 | 10 | 14 | 13 | 6 | 1 -> 1515361.