Alright, let's work through 20907996 times 60007409 step by step
20907996 × 60007409 = 60007409 × (20907996)
+ 60007409 × 6 that results in 360044454
+ 60007409 × 90 which equals 5400666810
+ 60007409 × 900 that results in 54006668100
+ 60007409 × 7000 producing 420051863000
+ 60007409 × 00000 that equals 0
+ 60007409 × 900000 what gives us 54006668100000
+ 60007409 × 0000000 giving us 0
+ 60007409 × 20000000 resulting in 1200148180000000

= 1254634667342364
