Problem 1
    432
   5678
-------
   3456
  3024
 2592
2160
-------
2452896
Problem 2
     200001
      90040
-----------
    8000040
180000900
-----------
18008090040
Problem 3
  246
   70
-----
17220
Problem 4
   5678
    432
-------
  11356
 17034
22712
-------
2452896
Problem 5
 234567
      8
-------
1876536
Problem 6
      8
 234567
-------
     56
    48
   40
  32
 24
16
-------
1876536
Problem 7
 22
 33
---
 66
66
---
726
Problem 8
  123456
      99
--------
 1111104
1111104
--------
12222144
Problem 9
      99
  123456
--------
     594
    495
   396
  297
 198
 99
--------
12222144
Problem 10
      999999
      999998
------------
     7999992
    8999991
   8999991
  8999991
 8999991
8999991
------------
999997000002
Problem 11
      999998
      999999
------------
     8999982
    8999982
   8999982
  8999982
 8999982
8999982
------------
999997000002
Problem 12
     100000
     100000
-----------
10000000000
Problem 13
      700000
      203004
------------
     2800000
  210000000
14000000
------------
142102800000