Alright, let's work through 48815559 times 19894786 step by step
48815559 × 19894786 = 19894786 × (48815559)
+ 19894786 × 9 that is equal 179053074
+ 19894786 × 50 what gives us 994739300
+ 19894786 × 500 which equals 9947393000
+ 19894786 × 5000 that is equal 99473930000
+ 19894786 × 10000 producing 198947860000
+ 19894786 × 800000 yielding 15915828800000
+ 19894786 × 8000000 that equals 159158288000000
+ 19894786 × 40000000 yielding 795791440000000

= 971175099775374
