pi@NanoPi-NEO2:~$ sudo apt update
Hit:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Get:2 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease [109 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports xenial-backports InRelease [107 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease [109 kB]
Get:5 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main Sources [348 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe Sources [269 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main arm64 Packages [774 kB]
Get:8 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main armhf Packages [834 kB]
Get:9 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main Translation-en [437 kB]
Get:10 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe arm64 Packages [744 kB]
Get:11 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe armhf Packages [716 kB]
Get:12 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe Translation-en [334 kB]
Get:13 http://ports.ubuntu.com/ubuntu-ports xenial-security/main Sources [165 kB]
Get:14 http://ports.ubuntu.com/ubuntu-ports xenial-security/universe Sources [119 kB]
Get:15 http://ports.ubuntu.com/ubuntu-ports xenial-security/multiverse Sources [3,408 B]
Get:16 http://ports.ubuntu.com/ubuntu-ports xenial-security/main arm64 Packages [532 kB]
Get:17 http://ports.ubuntu.com/ubuntu-ports xenial-security/main armhf Packages [586 kB]
Get:18 http://ports.ubuntu.com/ubuntu-ports xenial-security/main Translation-en [330 kB]
Get:19 http://ports.ubuntu.com/ubuntu-ports xenial-security/universe arm64 Packages [462 kB]
Get:20 http://ports.ubuntu.com/ubuntu-ports xenial-security/universe armhf Packages [434 kB]
Get:21 http://ports.ubuntu.com/ubuntu-ports xenial-security/universe Translation-en [202 kB]
Get:22 http://ports.ubuntu.com/ubuntu-ports xenial-security/multiverse arm64 Packages [2,464 B]
Get:23 http://ports.ubuntu.com/ubuntu-ports xenial-security/multiverse armhf Packages [3,376 B]
Get:24 http://ports.ubuntu.com/ubuntu-ports xenial-security/multiverse Translation-en [2,888 B]
Fetched 7,626 kB in 12s (611 kB/s)
Reading package lists... Done
Building dependency tree... Done
260 packages can be upgraded. Run 'apt list --upgradable' to see them.

pi@NanoPi-NEO2:~$ sudo apt-get install gcc-multilib
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
gcc-multilib:armhf : Depends: gcc:armhf (>= 4:5.3.1-1ubuntu1) but it is not going to be installed
Depends: gcc-5-multilib:armhf (>= 5.3.1-3~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I'd like to install 'gcc-multilib[', but NEO2 says broken package.
pls.. help..