virtual machine - Insufficient space after extending /dev/sda

Question

I just installed SLES 15 SP 1 on a Virtual Machine with 24 GB RAM and 350GB Hard Disk size.
Later I recognized hard disk size is not allocated to dev/sda and it was just using 80GB.
So I allocated to left space to dev/sda using gparted.
Now my /dev/sda is 350GB but /dev/mapper/system-root is still giving me an insufficient space error.
Then I checked disk usage using df -h :
results
And here is results of fdisk -l:
results How can I extend /dev/mapper/system-root

Answer 1

等待大神答复