Alright, let's work through 80471349 times 45082137 step by step
80471349 × 45082137 = 45082137 × (80471349)
+ 45082137 × 9 that is equal 405739233
+ 45082137 × 40 which equals 1803285480
+ 45082137 × 300 yielding 13524641100
+ 45082137 × 1000 what gives us 45082137000
+ 45082137 × 70000 producing 3155749590000
+ 45082137 × 400000 that equals 18032854800000
+ 45082137 × 0000000 yielding 0
+ 45082137 × 80000000 giving us 3606570960000000

= 3627820380192813
