94 x 78 = 7332

*73 = 9 x 7 + 10

  32 = 8 x 4

97 x 48 = 4656

*46 = 9 x 4 + 10

  56 = 7 x 8

49 x 87 = 4263

*42 = 4 x 8 + 10

  63 = 9 x 7

79 x 84 = 6636

*66 = 7 x 8 + 10

  36 = 9 x 4

86 x 68 = 5848

*58 = 8 x 6 + 10

  48 = 6 x 8

87 x 4 9 = 4263

*42 = 8 x 4 + 10

  63 = 7 x 9

84 x 98 = 8232

* 82 = 8 x 9 + 10

   32 = 4 x 8

89 x 48 = 4272

* 42 = 8 x 4 + 10

   72 = 9 x 8

**ad + bc = 100