Răspuns:
123*2=123×123=15129
1234*2=1234×1234=1.522.756
11.234×2=22.468
121234×2=242. 468
3×500=1500
3×505=1515
3×5005=15015
3×50.005=150.015
4×203=812
4×2003=8012
4×2203=8812
4×2223=8882
1101×8=8.808
1103×8=8.824
1105=×8840
2×2020=4040
3×2303=6909
4×2004=8016
5×2005=10.025