Alright, let's work through 27969749 times 72064407 step by step
27969749 × 72064407 = 72064407 × (27969749)
+ 72064407 × 9 which equals 648579663
+ 72064407 × 40 what gives us 2882576280
+ 72064407 × 700 that is equal 50445084900
+ 72064407 × 9000 giving us 648579663000
+ 72064407 × 60000 that is equal 4323864420000
+ 72064407 × 900000 resulting in 64857966300000
+ 72064407 × 7000000 that equals 504450849000000
+ 72064407 × 20000000 yielding 1441288140000000

= 2015623375623843
