Voltage Gauge 48v battery multiply value from Shelly uni

[marbella (Fran)]

Hi please excuse me, first time doing this… 62 years old
I need to measure the voltage of my PYLONTEC 48V
with a Shelly Uni that only can measure up to 30vdc so I put some
10k resistors and get a stable reading that I can display in HA
As a gauge etc

What I would like to do is to multiply the value by a factor of 3,35

platform: calculation
type: gauge
sensors:
value_calculation: ‘{{ ((states.sensor.70boiler_adc.state | float *3.35)) | round(2) }}’
friendly_name: CALCULATION
entity: calculation
name: Unimessung voltage *3.35 voltage splitter correction
unit: v
min: , post:1, topic:15476, full:t

platform: template
sensors:
  total_power_usage:
    value_template: '{{ ((states.se
    (states.sensor.70_boiler_adc.state | float) + 
    (
    friendly_name: 'Total voltage'
    unit_of_measurement: 'v'

max: 66
needle: true