Variable Thermostat

I tried
"thermostatTemperature":"$=$thermostat_temp-32*0.5556",
and this
"thermostatTemperature":"$=$thermostat_temp-32*5/9",
but what worked was this well close
"thermostatTemperature":"$=$thermostat_temp-105",
it seems like the game doesn't want to multiply the subtract

or is there another way?

195°F - 32 x 5/9 = 90°C
or
195°F - 32 x 0.5556 = 90°C
from google

 

ok I seem have to gotten very close to what the game wants I have managed to get this to work
(temp 194°F) × 0.5567 - 18
but if you equals it it makes
89.9998°C
so can someone help with rounding it?
or will it have to stay like that?

 

h e l l o ?

 

Have you tried adding parentheses in the calculation?

 

no.. I thought that wouldn't work i'll give it a try
--- Post updated ---
well it gives me executing expression failed

 

oh so good luck to find the good number