No problem, we've got 87603614 and 87394410 to multiply
87603614 × 87394410 = 87394410 × (87603614)
+ 87394410 × 4 what gives us 349577640
+ 87394410 × 10 which equals 873944100
+ 87394410 × 600 producing 52436646000
+ 87394410 × 3000 yielding 262183230000
+ 87394410 × 00000 what gives us 0
+ 87394410 × 600000 yielding 52436646000000
+ 87394410 × 7000000 that results in 611760870000000
+ 87394410 × 80000000 yielding 6991552800000000

= 7656066159397740
