Alright, let's work through 78638771 times 22205221 step by step
78638771 × 22205221 = 22205221 × (78638771)
+ 22205221 × 1 yielding 22205221
+ 22205221 × 70 that is equal 1554365470
+ 22205221 × 700 that is equal 15543654700
+ 22205221 × 8000 that results in 177641768000
+ 22205221 × 30000 that equals 666156630000
+ 22205221 × 600000 what gives us 13323132600000
+ 22205221 × 8000000 what gives us 177641768000000
+ 22205221 × 70000000 yielding 1554365470000000

= 1746191289223391
