1. 142857*7999999
2. 425*425=180625
3. 8947+8947=17894
4. 85679+85679=171358
5. 497919+7843=505762
6. 15306+15306=30612
7. 28375+28375+28375=85125
8. 94950+80850+74350=250150
9. 6823+6823=13646
10. 540498+60898+142058=743454
11. 45203+45203=90406