There are 6 packets of sugar on the table, containing 3, 4, 5, 7, 9, and 13 pieces of sugar respectively. Xiaohua takes 2 packets, and Xiao Ming takes 3 packets. It is known that the number of pieces of sugar that Xiao Ming took away is twice that of Xiao Hua, so how many pieces of sugar are in the remaining bag.
桌子上放着6包糖，分别装糖3、4、5、7、9、13块，小华拿走2包，小明拿走3包．已知小明拿走的糖的块数是小华的2倍，那么剩下的那包中的糖有多少块．
<result>5</result>