Since my native language is spanish, the blocks had to be adapted to my language. Also my idea was thanks to an mathematical problem, but at that moment I had to create a solution for that. 
x + x/2 + x/3 = 110
this is the real result:
x = 60
60 + 60/2 + 60/3 =110 or 60 + 30 + 20 = 110
Then x is the parameter to calculate the result.
The result is the condition.
Snap! Blocks Style:
snap!_blocks
execute (Calculadora 3000 (Test))
(call [
script variables (Resultado)
script variables (i)
warp
start
repeat until {(Resultado) = (Condición)}
start
change [i] in (1)
set [Resultado] to (call [((x) + (((x) / (2)) + ((x) / (3))))] with parameters: (x) < > ] (i) < > )
end
end
return (i) > ]
>
with parameters: (Condición) < > ]
with: (110) < > )
snap!_blocks
