Alright, let's work through 9807 times 5940 step by step
9807 × 5940 = 5940 × (9807)
+ 5940 × 7 giving us 41580
+ 5940 × 00 giving us 0
+ 5940 × 800 yielding 4752000
+ 5940 × 9000 that is equal 53460000

= 58253580
