Alright, let's work through 84841976 times 78802801 step by step
84841976 × 78802801 = 78802801 × (84841976)
+ 78802801 × 6 that results in 472816806
+ 78802801 × 70 producing 5516196070
+ 78802801 × 900 what gives us 70922520900
+ 78802801 × 1000 what gives us 78802801000
+ 78802801 × 40000 that equals 3152112040000
+ 78802801 × 800000 resulting in 63042240800000
+ 78802801 × 4000000 which equals 315211204000000
+ 78802801 × 80000000 yielding 6304224080000000

= 6685785351174776
