Alright, let's work through 90039945 times 46252421 step by step
90039945 × 46252421 = 46252421 × (90039945)
+ 46252421 × 5 what gives us 231262105
+ 46252421 × 40 which equals 1850096840
+ 46252421 × 900 yielding 41627178900
+ 46252421 × 9000 resulting in 416271789000
+ 46252421 × 30000 yielding 1387572630000
+ 46252421 × 000000 that is equal 0
+ 46252421 × 0000000 what gives us 0
+ 46252421 × 90000000 giving us 4162717890000000

= 4164565442956845
