No problem, we've got 6661 and 1340 to multiply
6661 × 1340 = 1340 × (6661)
+ 1340 × 1 that equals 1340
+ 1340 × 60 that is equal 80400
+ 1340 × 600 resulting in 804000
+ 1340 × 6000 that is equal 8040000

= 8925740
