df 问的是哪块盘

运行下面这段程序，填写它打印出来的结果。

KERNEL = "6.12.76-linuxkit"   # 和宿主机是同一个
ROOT_FS = "overlay"
LOWER_LAYERS = 9
MOUNTS = 22
MEM_MAX = 402653184           # cgroup 说的
FREE_SAYS_MB = 7937           # free 说的
DF_SAYS_G = 458               # df 说的
UID = 1000
CAP_EFF = 0                   # 一个能力都没生效
PROCS = 4

print(str(DF_SAYS_G) + "/" + ROOT_FS + "/" + str(MOUNTS))