Alright, let's work through 6998 times 3541 step by step
6998 × 3541 = 3541 × (6998)
+ 3541 × 8 that equals 28328
+ 3541 × 90 that results in 318690
+ 3541 × 900 giving us 3186900
+ 3541 × 6000 what gives us 21246000

= 24779918
