Alright, let's work through 6615428 times 82489640 step by step
6615428 × 82489640 = 82489640 × (6615428)
+ 82489640 × 8 resulting in 659917120
+ 82489640 × 20 what gives us 1649792800
+ 82489640 × 400 yielding 32995856000
+ 82489640 × 5000 that is equal 412448200000
+ 82489640 × 10000 yielding 824896400000
+ 82489640 × 600000 which equals 49493784000000
+ 82489640 × 6000000 that results in 494937840000000

= 545704274165920
