Răspuns :
1578 = 1 x 1000 + 5 x 100 + 7 x 10 + 8
4550 = 4 x 1000 + 5 x 100 + 5 x 10
198 873 = 198 x 1000 + 8 x 100 + 7 x 10 + 3
4550 = 4 x 1000 + 5 x 100 + 5 x 10
198 873 = 198 x 1000 + 8 x 100 + 7 x 10 + 3