We're going to solve 81742540 multiplied by 47001335
81742540 × 47001335 = 47001335 × (81742540)
+ 47001335 × 0 what gives us 0
+ 47001335 × 40 yielding 1880053400
+ 47001335 × 500 resulting in 23500667500
+ 47001335 × 2000 that equals 94002670000
+ 47001335 × 40000 what gives us 1880053400000
+ 47001335 × 700000 which equals 32900934500000
+ 47001335 × 1000000 giving us 47001335000000
+ 47001335 × 80000000 producing 3760106800000000

= 3842008506290900
