Alright, let's work through 1836 times 2780 step by step
1836 × 2780 = 2780 × (1836)
+ 2780 × 6 that equals 16680
+ 2780 × 30 that equals 83400
+ 2780 × 800 yielding 2224000
+ 2780 × 1000 that results in 2780000

= 5104080
