No problem, we've got 87745357 and 7385555 to multiply
87745357 × 7385555 = 7385555 × (87745357)
+ 7385555 × 7 what gives us 51698885
+ 7385555 × 50 that equals 369277750
+ 7385555 × 300 that is equal 2215666500
+ 7385555 × 5000 that equals 36927775000
+ 7385555 × 40000 producing 295422200000
+ 7385555 × 700000 producing 5169888500000
+ 7385555 × 7000000 yielding 51698885000000
+ 7385555 × 80000000 what gives us 590844400000000

= 648048160118135
