21*0.9=(18.9) 3.7*3=(11.1)
3.7*6=(22.2)
321*0.9=(288.9) 3.7*(9)=33.3
4321*0.9=(3888.9) 3.7*(12)=44.4
(54321)*0.9=48888.9 (3.7)*(15)=55.5
(654321)*(0.9)=588888.9