Alright, let's work through 1386 times 729 step by step
1386 × 729 = 729 × (1386)
+ 729 × 6 that equals 4374
+ 729 × 80 that results in 58320
+ 729 × 300 giving us 218700
+ 729 × 1000 giving us 729000

= 1010394
