No problem, we've got 87684387 and 85710879 to multiply
87684387 × 85710879 = 85710879 × (87684387)
+ 85710879 × 7 giving us 599976153
+ 85710879 × 80 resulting in 6856870320
+ 85710879 × 300 producing 25713263700
+ 85710879 × 4000 giving us 342843516000
+ 85710879 × 80000 producing 6856870320000
+ 85710879 × 600000 producing 51426527400000
+ 85710879 × 7000000 yielding 599976153000000
+ 85710879 × 80000000 that equals 6856870320000000

= 7515505884346173
