Alright, let's work through 12831975 times 89723434 step by step
12831975 × 89723434 = 89723434 × (12831975)
+ 89723434 × 5 what gives us 448617170
+ 89723434 × 70 resulting in 6280640380
+ 89723434 × 900 that results in 80751090600
+ 89723434 × 1000 that results in 89723434000
+ 89723434 × 30000 resulting in 2691703020000
+ 89723434 × 800000 that equals 71778747200000
+ 89723434 × 2000000 that equals 179446868000000
+ 89723434 × 10000000 resulting in 897234340000000

= 1151328862002150
