Alright, let's work through 42761003 times 78858540 step by step
42761003 × 78858540 = 78858540 × (42761003)
+ 78858540 × 3 that is equal 236575620
+ 78858540 × 00 which equals 0
+ 78858540 × 000 that results in 0
+ 78858540 × 1000 producing 78858540000
+ 78858540 × 60000 which equals 4731512400000
+ 78858540 × 700000 that results in 55200978000000
+ 78858540 × 2000000 which equals 157717080000000
+ 78858540 × 40000000 producing 3154341600000000

= 3372070265515620
