Squares Level 29: 4d square full range. multiplication window train. 1. Left Edge4321 squared equals 4321 times itself1. Left EdgeUse the highlighted left edge pair.4321times43214x4162 pairs3 pairs4 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 16 | _ | _ | _ | _ | _ | _Use the highlighted left edge pair. Carry waits for settle.2. 2-Pair Window2. 2-Pair WindowAdd both highlighted pairs.4321times43214x4162 pairs243 pairs4 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 16 | 24 | _ | _ | _ | _ | _Add both highlighted pairs. Carry waits for settle.3. 3-Pair Window3. 3-Pair WindowAdd all 3 highlighted pairs.4321times43214x4162 pairs243 pairs254 pairs3 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 16 | 24 | 25 | _ | _ | _ | _Add all 3 highlighted pairs. Carry waits for settle.4. 4-Pair Center4. 4-Pair CenterAdd all 4 highlighted pairs.4321times43214x4162 pairs243 pairs254 pairs203 pairs2 pairs1x1Active multiplication train windowraw windowsraw -> 16 | 24 | 25 | 20 | _ | _ | _Add all 4 highlighted pairs. Carry waits for settle.5. 3-Pair Right Window5. 3-Pair Right WindowAdd all 3 highlighted pairs.4321times43214x4162 pairs243 pairs254 pairs203 pairs102 pairs1x1Active multiplication train windowraw windowsraw -> 16 | 24 | 25 | 20 | 10 | _ | _Add all 3 highlighted pairs. Carry waits for settle.6. 2-Pair Right Window6. 2-Pair Right WindowAdd both highlighted pairs.4321times43214x4162 pairs243 pairs254 pairs203 pairs102 pairs41x1Active multiplication train windowraw windowsraw -> 16 | 24 | 25 | 20 | 10 | 4 | _Add both highlighted pairs.7. 1-Pair Right Edge7. 1-Pair Right EdgeUse the highlighted right edge pair.4321times43214x4162 pairs243 pairs254 pairs203 pairs102 pairs41x11Active multiplication train windowraw windowsraw -> 16 | 24 | 25 | 20 | 10 | 4 | 1Use the highlighted right edge pair.8. Settle strip8. Settle stripSettle once.Keep ones; carry moves left.raw windows16 | 24 | 25 | 20 | 10 | 4 | 1settled strip18 | 6 | 7 | 1 | 0 | 4 | 1Final multiplication answer16 | 24 | 25 | 20 | 10 | 4 | 1 -> 18671041.