Alright, let's work through 80077347 times 21256281 step by step
80077347 × 21256281 = 21256281 × (80077347)
+ 21256281 × 7 resulting in 148793967
+ 21256281 × 40 that is equal 850251240
+ 21256281 × 300 which equals 6376884300
+ 21256281 × 7000 that is equal 148793967000
+ 21256281 × 70000 that results in 1487939670000
+ 21256281 × 000000 that is equal 0
+ 21256281 × 0000000 that results in 0
+ 21256281 × 80000000 giving us 1700502480000000

= 1702146589566507
