Expand: 635891
6*100000+3*10000+5*1000+8*100+9*1+10*1
6*10000+3*10000+5*1000+8*100+9*1
6*100000+3*10000+5*1000+8*100+9*1
6*100000+3*10000+5*1000+8*100+9*10+1*1
6 × 100000 = 600000
3 × 10000 = 30000
5 × 1000 = 5000
8 × 100 = 800
9 × 10 = 90
1 × 1 = 1
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