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import java.awt.*;
public class calculator
{
public static void main(String args[])
{
int i;
Frame f1=new Frame();
BorderLayout b=new BorderLayout();
f1.setLayout(b);
f1.setBounds(100,100,280,300);
f1.setResizable(false);
f1.setVisible(true);
TextField mainTxt=new TextField("0");
f1.add(mainTxt,BorderLayout.NORTH);
Panel p1=new Panel();
p1.setLayout(new BorderLayout(0,15));
f1.add(p1);
Panel p2=new Panel();
p1.add(p2,BorderLayout.NORTH);
p2.setLayout(new GridLayout(1,4,5,5));
TextField t1=new TextField();
p2.add(t1);
Button b1[]=new Button[3];
b1[0]=new Button("Backspace");
b1[1]=new Button("CE");
b1[2]=new Button("C");
for(i=0;i<3;i++)
{
p2.add(b1[i]);
}
Panel p3=new Panel();
p1.add(p3);
p3.setLayout(new GridLayout(4,6,5,5));
Button b2[]=new Button[24];
String s[]={&quo
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