Как получить значения event.taget для нескольких входных значений внутри функции.пожалуйста помочь.

<div class="col-md-6" (change)="calculateDob($event.target.name.value)">
 <label class="col-sm-3 control-label mandatory">Approx. Age</label>
 <input type="text" name='years' class="form-control" placeholder="Years" 
 maxlength="3" formControlName="y">
 <input type="text"  name='months' class="form-control" placeholder="Months" 
 maxlength="2" formControlName="m">
 <input type="text"  name='days' class="form-control" placeholder="Days" maxlength="2" 
 formControlName="d">
 </div>

 <div class="col-md-6">
 <label> Approx. Date Of Birth </label>
 <input type="date" class="form-control" formControlName="dateOfBirth" 
 [(ngModel)]="birthDay" disabled>
 </div>

calculateDob(total){
this.birthDay = moment().subtract(total.name.years, 'years').subtract(total.name.months, 'months').subtract(total.name.days, 'days');
}