No problem, we've got 4572 and 4378 to multiply
4572 × 4378 = 4378 × (4572)
+ 4378 × 2 that is equal 8756
+ 4378 × 70 that equals 306460
+ 4378 × 500 that is equal 2189000
+ 4378 × 4000 resulting in 17512000

= 20016216
