Alright, let's work through 87580379 times 38439753 step by step
87580379 × 38439753 = 38439753 × (87580379)
+ 38439753 × 9 that results in 345957777
+ 38439753 × 70 that results in 2690782710
+ 38439753 × 300 giving us 11531925900
+ 38439753 × 0000 which equals 0
+ 38439753 × 80000 that is equal 3075180240000
+ 38439753 × 500000 which equals 19219876500000
+ 38439753 × 7000000 producing 269078271000000
+ 38439753 × 80000000 giving us 3075180240000000

= 3366568136406387
