Alright, let's work through 5285 times 4378 step by step
5285 × 4378 = 4378 × (5285)
+ 4378 × 5 that results in 21890
+ 4378 × 80 resulting in 350240
+ 4378 × 200 what gives us 875600
+ 4378 × 5000 that equals 21890000

= 23137730
