Test trigger expression in frontend doing wrong calculates.

For reproducing:
1) create a custom LLD discovery or use from box(in my example it is Mounted filesystem discovery from Template OS Linux).
2) trigger prototype expression like this ({Zabbix server:vfs.fs.size[

{#FSNAME},pfree].last(0)}< {#UMACRO} & {Zabbix server:vfs.fs.size[{#FSNAME}

,pfree].time(0)}> 080000)
3) try to test it with numbers like in the attached screenshot

Related to ZBXNEXT-1286