1. 8005 · 305
8005 x 305 ------- 40025 (8005 * 5) 00000 (8005 * 0) 24015 (8005 * 3) ------- 2441525
2. 2007 · 3006
2007 x 3006 ------- 12042 (2007 * 6) 00000 (2007 * 0) 00000 (2007 * 0) 6021 (2007 * 3) ------- 6033042
3. 6300 · 123
6300 x 123 ------- 18900 (6300 * 3) 12600 (6300 * 2) 6300 (6300 * 1) ------- 774900
4. 1090 · 2030
1090 x 2030 ------- 0000 (1090 * 0) 3270 (1090 * 3) 0000 (1090 * 0) 2180 (1090 * 2) ------- 2212700