Alright, let's work through 81616041 times 73227508 step by step
81616041 × 73227508 = 73227508 × (81616041)
+ 73227508 × 1 giving us 73227508
+ 73227508 × 40 giving us 2929100320
+ 73227508 × 000 what gives us 0
+ 73227508 × 6000 yielding 439365048000
+ 73227508 × 10000 producing 732275080000
+ 73227508 × 600000 yielding 43936504800000
+ 73227508 × 1000000 that is equal 73227508000000
+ 73227508 × 80000000 producing 5858200640000000

= 5976539295255828
