No problem, we've got 1555 and 7958 to multiply
1555 × 7958 = 7958 × (1555)
+ 7958 × 5 resulting in 39790
+ 7958 × 50 giving us 397900
+ 7958 × 500 that results in 3979000
+ 7958 × 1000 that equals 7958000

= 12374690
