No problem, we've got 84728430 and 64415473 to multiply
84728430 × 64415473 = 64415473 × (84728430)
+ 64415473 × 0 giving us 0
+ 64415473 × 30 that results in 1932464190
+ 64415473 × 400 which equals 25766189200
+ 64415473 × 8000 that is equal 515323784000
+ 64415473 × 20000 what gives us 1288309460000
+ 64415473 × 700000 resulting in 45090831100000
+ 64415473 × 4000000 which equals 257661892000000
+ 64415473 × 80000000 that is equal 5153237840000000

= 5457821894997390
