Alright, let's work through 70312121 times 83640820 step by step
70312121 × 83640820 = 83640820 × (70312121)
+ 83640820 × 1 that is equal 83640820
+ 83640820 × 20 resulting in 1672816400
+ 83640820 × 100 that equals 8364082000
+ 83640820 × 2000 giving us 167281640000
+ 83640820 × 10000 that is equal 836408200000
+ 83640820 × 300000 that equals 25092246000000
+ 83640820 × 0000000 which equals 0
+ 83640820 × 70000000 giving us 5854857400000000

= 5880963456379220
