Как получить значение входного числа при нажатии кнопки

   <p *ngFor = "let product of ProductsDetails; let i = index">
     <input type = "number" [(ngModel)] = "values[i]" value = {{cartProducts[i].amount}} class = "quantInput"> 
     <button mat-raised-button color = "primary" class = "changeBTN" (click) = "doSomethingWithInputValue(i)" >change</button>
   </p>

ts-файл

values: any[];

//initialize array when you have loaded productDetails
ProductDetails.forEach((productDetail) => {
     this.values.push({});
});


public doSomethingWithInputValue(index){

    const currentInputValue = this.values[index];
    ...do everything you want with this value here
    }