so each batch makes 14 pieces
and she need 8 dozen (dozen=12) so 8 dozen=8*12=96
so 14 pieces per batch
needs 96 pieces
x=number of batches
14 times x=96
14x=96
divide both sides by 14
x=96/14
96/14= aprox 6.86
but you normally can't make a fraction of a batch so she need to make 7 batches at the least