Alright, let's work through 1402 times 9920 step by step
1402 × 9920 = 9920 × (1402)
+ 9920 × 2 that equals 19840
+ 9920 × 00 that equals 0
+ 9920 × 400 that results in 3968000
+ 9920 × 1000 yielding 9920000

= 13907840
