Alright, let's work through 2250 times 5642 step by step
2250 × 5642 = 5642 × (2250)
+ 5642 × 0 what gives us 0
+ 5642 × 50 producing 282100
+ 5642 × 200 that is equal 1128400
+ 5642 × 2000 what gives us 11284000

= 12694500
