Kendra has 4 packs x 3 pens/pack =<<4*3=12>>12 pens
Tony has 2 packs x 3 pens/pack = <<2*3=6>>6 pens
In total Kendra and Tony have 12 pens + 6 pens = <<12+6=18>>18 pens
If they each keep 2 pens, they keep 2 x 2 = <<2*2=4>>4 pens
They will be able to give a pen to 18 pens - 4 pens = <<18-4=14>>14 of their friends
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