No problem, we've got 85254870 and 80521489 to multiply
85254870 × 80521489 = 80521489 × (85254870)
+ 80521489 × 0 resulting in 0
+ 80521489 × 70 yielding 5636504230
+ 80521489 × 800 what gives us 64417191200
+ 80521489 × 4000 resulting in 322085956000
+ 80521489 × 50000 that equals 4026074450000
+ 80521489 × 200000 what gives us 16104297800000
+ 80521489 × 5000000 giving us 402607445000000
+ 80521489 × 80000000 what gives us 6441719120000000

= 6864849076901430
