"There's a persimmon tree on the mountaintop. Any five persimmons picked from that tree will weigh 1 jin 2 liang, so if you want 180 jin of persimmons, how many are you going to have to pick?"
「山頂一叢（棵）柿，每生五粒斤二，要生一百八十斤，共幾粒？」