Alright, let's work through 87072593 times 70886957 step by step
87072593 × 70886957 = 70886957 × (87072593)
+ 70886957 × 3 that is equal 212660871
+ 70886957 × 90 that equals 6379826130
+ 70886957 × 500 yielding 35443478500
+ 70886957 × 2000 giving us 141773914000
+ 70886957 × 70000 yielding 4962086990000
+ 70886957 × 000000 resulting in 0
+ 70886957 × 7000000 resulting in 496208699000000
+ 70886957 × 80000000 what gives us 5670956560000000

= 6172311155869501
