Alright, let's work through 2050 times 5642 step by step
2050 × 5642 = 5642 × (2050)
+ 5642 × 0 yielding 0
+ 5642 × 50 what gives us 282100
+ 5642 × 000 what gives us 0
+ 5642 × 2000 yielding 11284000

= 11566100
