Alright, let's work through 44002021 times 53642007 step by step
44002021 × 53642007 = 53642007 × (44002021)
+ 53642007 × 1 resulting in 53642007
+ 53642007 × 20 that equals 1072840140
+ 53642007 × 000 that results in 0
+ 53642007 × 2000 that is equal 107284014000
+ 53642007 × 00000 yielding 0
+ 53642007 × 000000 that results in 0
+ 53642007 × 4000000 that results in 214568028000000
+ 53642007 × 40000000 yielding 2145680280000000

= 2360356718496147
