Alright, let's work through 2070 times 4378 step by step
2070 × 4378 = 4378 × (2070)
+ 4378 × 0 which equals 0
+ 4378 × 70 giving us 306460
+ 4378 × 000 that results in 0
+ 4378 × 2000 which equals 8756000

= 9062460
