How to handle HTTP request using React JavaScript [closed]

I am learning how to receive the inputs then call the backend service that has parameters (numberX, numberY, numberZ). This backend service calculates the entered inputs from client (there is no database involved just the service). I want to use the fetch API, should I use the get or post? The API is 'http://localhost:1234/?numberX=25&numberY=12&numberZ=21'.

export const Calculator = () => {
  const [numberX, setNumberX] = useState('0.0');
  const numberXAsNumber = Number(numberX);
  const [numberY, setNumberX] = useState('0.0');
  const numberYAsNumber = Number(numberY);
  const [numberX, setNumberZ] = useState('0.0');
  const numberZAsNumber = Number(numberZ);
return ( 
  // Calculator
  <Form>
    <Input type="number" name="numberX" label="Number X" 
           value={numberX} onChange=(e => setNumberX(e.target.value)} 
           min="0.0" required />
    <Input type="number" name="numberY" label="Number Y" 
           value={numberY} onChange=(e => setNumberY(e.target.value)} 
           min="0.0" required />
    <Input type="number" name="numberZ" label="Number Z" 
           value={numberZ} onChange=(e => setNumberZ(e.target.value)} 
           min="0" required />
    <Button type=submit>Calculate</Button>
  </Form>
  <div>
            { Number X > -1 && 
                <p>Number X: {numberX} X</p>
            }

            {
                number Y > -1 &&
                <p>Number Y: {numberY} Y</p>
            }

            {
                numberZ > -1 &&
                <p>Number Z: {numberZ} Z</p>
            }
  // Below is the display of calculated inputs - My goal is to have another component    like this.
  <DisplayCalculatedInputs />
  </div>
   
)
}