李奶奶的菜园里有白菜684棵，生菜比白菜少189棵，菜园里有生菜多少棵？:W2m;a)m'U7l'Q2Q
算式：提示'k/[:v3K4Z)G:q3K:W2m;a)m'U7l'Q2Q
答：菜园里有生菜.H)D,`,H;Z4x-R9J/h棵。:W2m;a)m'U7l'Q2Q