Alright, let's work through 63968738 times 87958021 step by step
63968738 × 87958021 = 87958021 × (63968738)
+ 87958021 × 8 producing 703664168
+ 87958021 × 30 giving us 2638740630
+ 87958021 × 700 what gives us 61570614700
+ 87958021 × 8000 resulting in 703664168000
+ 87958021 × 60000 that results in 5277481260000
+ 87958021 × 900000 that equals 79162218900000
+ 87958021 × 3000000 that is equal 263874063000000
+ 87958021 × 60000000 producing 5277481260000000

= 5626563600347498
