Alright, let's work through 5603 times 6691 step by step
5603 × 6691 = 6691 × (5603)
+ 6691 × 3 what gives us 20073
+ 6691 × 00 which equals 0
+ 6691 × 600 giving us 4014600
+ 6691 × 5000 that is equal 33455000

= 37489673
