Alright, let's work through 9842 times 1780 step by step
9842 × 1780 = 1780 × (9842)
+ 1780 × 2 what gives us 3560
+ 1780 × 40 which equals 71200
+ 1780 × 800 that results in 1424000
+ 1780 × 9000 that results in 16020000

= 17518760
