Alright, let's work through 11289505 times 6422789 step by step
11289505 × 6422789 = 6422789 × (11289505)
+ 6422789 × 5 giving us 32113945
+ 6422789 × 00 that equals 0
+ 6422789 × 500 that is equal 3211394500
+ 6422789 × 9000 that results in 57805101000
+ 6422789 × 80000 what gives us 513823120000
+ 6422789 × 200000 that is equal 1284557800000
+ 6422789 × 1000000 producing 6422789000000
+ 6422789 × 10000000 that is equal 64227890000000

= 72510108529445
