Alright, let's work through 21701943 times 83477538 step by step
21701943 × 83477538 = 83477538 × (21701943)
+ 83477538 × 3 what gives us 250432614
+ 83477538 × 40 yielding 3339101520
+ 83477538 × 900 what gives us 75129784200
+ 83477538 × 1000 yielding 83477538000
+ 83477538 × 00000 what gives us 0
+ 83477538 × 700000 resulting in 58434276600000
+ 83477538 × 1000000 resulting in 83477538000000
+ 83477538 × 20000000 that results in 1669550760000000

= 1811624771456334
