def jisuan_zongjia(danjia, shuliang, zhekou):
"""
Jisuan shangpin zongjia, kaolv zhekou
Canshu:
danjia: Mei jian shangpin de jiage
shuliang: Shangpin shuliang
zhekou: Zhekou bili (0 dao 1 zhi jian)
Fanhui:
Zongjia (yi kouchu zhekou)
"""
yuanshi_zongjia = danjia * shuliang
zhekou_jine = yuanshi_zongjia * zhekou
zuizhong_zongjia = yuanshi_zongjia - zhekou_jine
return zuizhong_zongjia
# Shili shiyong
shangpin_danjia = 100
goumai_shuliang = 5
zhekou_bili = 0.2 # 20% zhekou
zongjia = jisuan_zongjia(shangpin_danjia, goumai_shuliang, zhekou_bili)
print(f"Zuizhong zongjia: {zongjia} yuan")