How to enable calling from the number displayed in Xamarin.Forms.DataGrid

I am using Xamarin.Forms.DataGrid for displaying data as a report.When i click any number i want to open phone dialer.
i have implemented opening phone dialer using xamarin.essentials i want to implement it when i click a number or click on a row in datagrid.
How can i do that.

please help.

`< / StackLayout >
< dg:DataGrid x:Name="SalesGrid" RowHeight="45" FontSize="12" HeaderFontSize="15" HorizontalOptions="FillAndExpand" >

            < dg:DataGrid.Columns >

                < dg:DataGridColumn Title="Date" PropertyName="Date"  Width="150"  HorizontalContentAlignment="StartAndExpand" VerticalContentAlignment="CenterAndExpand"/>
                < dg:DataGridColumn Title="Number" PropertyName="Num" Width="170" HorizontalContentAlignment="StartAndExpand" VerticalContentAlignment="CenterAndExpand" />

                < dg:DataGridColumn Title="nhg"  Width="0" >

                    < dg:DataGridColumn.CellTemplate >
                        < DataTemplate >
                             < ContentView  VerticalOptions="FillAndExpand"  HorizontalOptions="StartAndExpand"  >
                                < Label Text="{Binding SALES}" HorizontalOptions="Center" VerticalOptions="Center" TextColor="White" />
                            </ ContentView >
                        </ DataTemplate >
                    </ dg:DataGridColumn.CellTemplate >
                </ dg:DataGridColumn >
            </ dg:DataGrid.Columns >
        </ dg:DataGrid >
    </ StackLayout >`