Alright, let's work through 1358 times 6891 step by step
1358 × 6891 = 6891 × (1358)
+ 6891 × 8 what gives us 55128
+ 6891 × 50 producing 344550
+ 6891 × 300 giving us 2067300
+ 6891 × 1000 that equals 6891000

= 9357978
