Alright, let's work through 13579821 times 98490604 step by step
13579821 × 98490604 = 98490604 × (13579821)
+ 98490604 × 1 which equals 98490604
+ 98490604 × 20 resulting in 1969812080
+ 98490604 × 800 that equals 78792483200
+ 98490604 × 9000 that results in 886415436000
+ 98490604 × 70000 that results in 6894342280000
+ 98490604 × 500000 that results in 49245302000000
+ 98490604 × 3000000 resulting in 295471812000000
+ 98490604 × 10000000 what gives us 984906040000000

= 1337484772501884
