gistfile1.txt

import { Component, OnInit } from '@angular/core';
import {FormGroup,FormControl,Validators} from '@angular/forms'
import { dashCaseToCamelCase } from '@angular/compiler/src/util';

@Component({
  selector: 'app-fuel-calculation',
  templateUrl: './fuel-calculation.component.html',
  styleUrls: ['./fuel-calculation.component.css'],
})
export class FuelCalculationComponent implements OnInit {

  form = new FormGroup({
    amount : new FormControl('', Validators.required),
    fuelPrice : new FormControl('', Validators.required),
    discountSum : new FormControl('', Validators.required )
  });

amountTotal;
discountTotal;
total;
fuelTotal;
// amountTotal=this.form.controls.amount.value;
// discountTotal=this.form.controls.discountSum.value;
// fuelTotal =this.form.controls.fuelPrice.value;

  Calc(){

    this.amountTotal = this.form.controls.amount.value;
    this.discountTotal = this.form.controls.discountSum.value;
    this.fuelTotal = this.form.controls.fuelPrice.value;
    this.total = (this.amountTotal/this.fuelTotal) * (this.fuelTotal - this.discountTotal);

    console.log(this.total);


  }

  ngOnInit() {
  }

}