No problem, we've got 7640 and 1635 to multiply
7640 × 1635 = 1635 × (7640)
+ 1635 × 0 giving us 0
+ 1635 × 40 that equals 65400
+ 1635 × 600 that is equal 981000
+ 1635 × 7000 that results in 11445000

= 12491400
