How to calculate field value based on two other fields?

Hi, I have 3 fields: vehicle price, down payment and loan amount. When I fill vehicle price and down payment, I want to set loan amount value as vehicle price minus down payment.

TextInput::make('vehicle_price')
    ->suffix('€')
    ->reactive(),

TextInput::make('down_payment')
    ->suffix('€')
    ->reactive(),

TextInput::make('loan_amount')
    ->suffix('€'),

TextInput::make('vehicle_price')
    ->suffix('€')
    ->reactive(),

TextInput::make('down_payment')
    ->suffix('€')
    ->reactive(),

TextInput::make('loan_amount')
    ->suffix('€'),

How to calculate field value based on two other fields?

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How to calculate field value based on two other fields?

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