3个人做小红旗，每人做7面，一共做了多少每？)U6o;J4G:@:c:\
算式：提示6B5b0c:I(P:M)U6o;J4G:@:c:\
答；一共做了3^3r:H'k,B(G5K面。)U6o;J4G:@:c:\