Alright, let's work through 21617755 times 78427530 step by step
21617755 × 78427530 = 78427530 × (21617755)
+ 78427530 × 5 giving us 392137650
+ 78427530 × 50 producing 3921376500
+ 78427530 × 700 that is equal 54899271000
+ 78427530 × 7000 giving us 548992710000
+ 78427530 × 10000 that results in 784275300000
+ 78427530 × 600000 which equals 47056518000000
+ 78427530 × 1000000 resulting in 78427530000000
+ 78427530 × 20000000 yielding 1568550600000000

= 1695427128795150
