No problem, we've got 79889728 and 89368703 to multiply
79889728 × 89368703 = 89368703 × (79889728)
+ 89368703 × 8 yielding 714949624
+ 89368703 × 20 giving us 1787374060
+ 89368703 × 700 producing 62558092100
+ 89368703 × 9000 that results in 804318327000
+ 89368703 × 80000 what gives us 7149496240000
+ 89368703 × 800000 that is equal 71494962400000
+ 89368703 × 9000000 producing 804318327000000
+ 89368703 × 70000000 resulting in 6255809210000000

= 7139641374382784
