Alright, let's work through 87660872 times 47198467 step by step
87660872 × 47198467 = 47198467 × (87660872)
+ 47198467 × 2 giving us 94396934
+ 47198467 × 70 yielding 3303892690
+ 47198467 × 800 yielding 37758773600
+ 47198467 × 0000 which equals 0
+ 47198467 × 60000 yielding 2831908020000
+ 47198467 × 600000 which equals 28319080200000
+ 47198467 × 7000000 that is equal 330389269000000
+ 47198467 × 80000000 yielding 3775877360000000

= 4137458774283224
