Alright, let's work through 90187740 times 79348012 step by step
90187740 × 79348012 = 79348012 × (90187740)
+ 79348012 × 0 that results in 0
+ 79348012 × 40 what gives us 3173920480
+ 79348012 × 700 yielding 55543608400
+ 79348012 × 7000 what gives us 555436084000
+ 79348012 × 80000 what gives us 6347840960000
+ 79348012 × 100000 that results in 7934801200000
+ 79348012 × 0000000 giving us 0
+ 79348012 × 90000000 giving us 7141321080000000

= 7156217875772880
