Kristin is working as a UI Designer at GlobalTech Inc. She has been assigned the task to design the UI of a Calculator app, which should appear, as shown in the following figure.

Kristin is working as a UI Designer at GlobalTech Inc. She has been assigned the task to design
the UI of a Calculator app, which should appear, as shown in the following figure.
The Expected UI of the Calculator App
Help Kristin to accomplish the preceding task.

Solution:

<Button Content="7" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="8" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="9" Width="173" FontSize="60" Background="Blue" BorderThick/>
               
<Button Content="4" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="5" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="6" Width="173" FontSize="60" Background="Blue" BorderThick/>
               
<Button Content="1" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="2" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="3" Width="173" FontSize="60" Background="Blue" BorderThick/>

<Button Content="." Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="0" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="Clear" Width="173" FontSize="60" Background="Blue" BorderThick/>
       
<Button Content="+" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="-" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="*" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="/" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="?" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="1/x" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="+_" Width="173" FontSize="60" Background="Blue" BorderThick/>
<Button Content="=" Width="173" FontSize="60" Background="Blue" BorderThick/>
<TextBlock x:Name="txtlkResult" HorizontalAlignment="Center" FontSize="80"/>