No problem, we've got 1603 and 6158 to multiply
1603 × 6158 = 6158 × (1603)
+ 6158 × 3 yielding 18474
+ 6158 × 00 what gives us 0
+ 6158 × 600 yielding 3694800
+ 6158 × 1000 that results in 6158000

= 9871274
