Alright, let's work through 90825399 times 40366818 step by step
90825399 × 40366818 = 40366818 × (90825399)
+ 40366818 × 9 what gives us 363301362
+ 40366818 × 90 giving us 3633013620
+ 40366818 × 300 yielding 12110045400
+ 40366818 × 5000 giving us 201834090000
+ 40366818 × 20000 yielding 807336360000
+ 40366818 × 800000 which equals 32293454400000
+ 40366818 × 0000000 resulting in 0
+ 40366818 × 90000000 yielding 3633013620000000

= 3666332351210382
