Let's calculate 1243 x 5003
1243 × 5003 = 5003 × (1243)
+ 5003 × 3 what gives us 15009
+ 5003 × 40 that results in 200120
+ 5003 × 200 giving us 1000600
+ 5003 × 1000 that is equal 5003000

= 6218729
