Alright, let's work through 41397011 times 40621507 step by step
41397011 × 40621507 = 40621507 × (41397011)
+ 40621507 × 1 giving us 40621507
+ 40621507 × 10 yielding 406215070
+ 40621507 × 000 what gives us 0
+ 40621507 × 7000 giving us 284350549000
+ 40621507 × 90000 resulting in 3655935630000
+ 40621507 × 300000 what gives us 12186452100000
+ 40621507 × 1000000 giving us 40621507000000
+ 40621507 × 40000000 which equals 1624860280000000

= 1681608972115577
