We're going to solve 97971215 multiplied by 40815987
97971215 × 40815987 = 40815987 × (97971215)
+ 40815987 × 5 giving us 204079935
+ 40815987 × 10 which equals 408159870
+ 40815987 × 200 that equals 8163197400
+ 40815987 × 1000 that results in 40815987000
+ 40815987 × 70000 which equals 2857119090000
+ 40815987 × 900000 yielding 36734388300000
+ 40815987 × 7000000 which equals 285711909000000
+ 40815987 × 90000000 yielding 3673438830000000

= 3998791837814205
