With sensor.in_range, using below: with a chaning value

How can I change the value in a condition?

here is my code
‘’’’
number:

  • platform: template
    name: “Inschakelwaarde”
    id: inschakel
    min_value: 0
    max_value: 3600
    step: 100
    restore_value: false
    optimistic: true

script:

  • id: boilersturing
    then:
    • if:
      condition:
      and:
      • sensor.in_range:
        id: terugpower
        below: lambda: |-
        x = id(inschakel).state;
        return 25.0;

      • switch.is_on: boilerswitch
        then:

      • switch.turn_off: boilerswitch
        ‘’’

I want to change the value ‘below’ with the value of a sensor, but I get all the time " expected float "