Alright, let's work through 78378526 times 15225470 step by step
78378526 × 15225470 = 15225470 × (78378526)
+ 15225470 × 6 what gives us 91352820
+ 15225470 × 20 which equals 304509400
+ 15225470 × 500 giving us 7612735000
+ 15225470 × 8000 producing 121803760000
+ 15225470 × 70000 that equals 1065782900000
+ 15225470 × 300000 giving us 4567641000000
+ 15225470 × 8000000 yielding 121803760000000
+ 15225470 × 70000000 what gives us 1065782900000000

= 1193349896257220
