Alright, let's work through 28323612 times 64123901 step by step
28323612 × 64123901 = 64123901 × (28323612)
+ 64123901 × 2 giving us 128247802
+ 64123901 × 10 that results in 641239010
+ 64123901 × 600 giving us 38474340600
+ 64123901 × 3000 that results in 192371703000
+ 64123901 × 20000 that is equal 1282478020000
+ 64123901 × 300000 that is equal 19237170300000
+ 64123901 × 8000000 resulting in 512991208000000
+ 64123901 × 20000000 that equals 1282478020000000

= 1816220491850412
