No problem, we've got 3428 and 1309 to multiply
3428 × 1309 = 1309 × (3428)
+ 1309 × 8 that equals 10472
+ 1309 × 20 what gives us 26180
+ 1309 × 400 that is equal 523600
+ 1309 × 3000 that is equal 3927000

= 4487252
