No problem, we've got 86145344 and 64754956 to multiply
86145344 × 64754956 = 64754956 × (86145344)
+ 64754956 × 4 resulting in 259019824
+ 64754956 × 40 that equals 2590198240
+ 64754956 × 300 producing 19426486800
+ 64754956 × 5000 what gives us 323774780000
+ 64754956 × 40000 giving us 2590198240000
+ 64754956 × 100000 that equals 6475495600000
+ 64754956 × 6000000 that results in 388529736000000
+ 64754956 × 80000000 resulting in 5180396480000000

= 5578337960324864
