question mana

[Faffe]

$myhp$
#number>=#
1000
0
300
1
exiva _exuraico = 0
$mymana$
#number>=#
40
0
300
1
exiva _exuraico = $numericalexp:{$_exuraico$}+1$
$_exuraico$
#number>=#
2
0
300
1
exura ico

dont work, how i can do to it´s work