Alright, let's work through 55100107 times 50421040 step by step
55100107 × 50421040 = 50421040 × (55100107)
+ 50421040 × 7 that results in 352947280
+ 50421040 × 00 that results in 0
+ 50421040 × 100 that results in 5042104000
+ 50421040 × 0000 resulting in 0
+ 50421040 × 00000 which equals 0
+ 50421040 × 100000 giving us 5042104000000
+ 50421040 × 5000000 resulting in 252105200000000
+ 50421040 × 50000000 resulting in 2521052000000000

= 2778204699051280
