Alright, let's work through 42191061 times 86466220 step by step
42191061 × 86466220 = 86466220 × (42191061)
+ 86466220 × 1 producing 86466220
+ 86466220 × 60 producing 5187973200
+ 86466220 × 000 that is equal 0
+ 86466220 × 1000 that results in 86466220000
+ 86466220 × 90000 what gives us 7781959800000
+ 86466220 × 100000 that equals 8646622000000
+ 86466220 × 2000000 giving us 172932440000000
+ 86466220 × 40000000 resulting in 3458648800000000

= 3648101562459420
