Alright, let's work through 25004200 times 87167458 step by step
25004200 × 87167458 = 87167458 × (25004200)
+ 87167458 × 0 that equals 0
+ 87167458 × 00 that is equal 0
+ 87167458 × 200 that results in 17433491600
+ 87167458 × 4000 resulting in 348669832000
+ 87167458 × 00000 that is equal 0
+ 87167458 × 000000 giving us 0
+ 87167458 × 5000000 giving us 435837290000000
+ 87167458 × 20000000 that is equal 1743349160000000

= 2179552553323600
