No problem, we've got 1047 and 1605 to multiply
1047 × 1605 = 1605 × (1047)
+ 1605 × 7 what gives us 11235
+ 1605 × 40 what gives us 64200
+ 1605 × 000 that results in 0
+ 1605 × 1000 that results in 1605000

= 1680435
