import java.applet.*;import java.awt.*;import java.awt.event.*;import java.awt.event.KeyEvent;public class Calculator extends Frame implements ActionListener{Â Button b[]=new Button[16];Â Â TextField tf;Â Â Panel pi1;Â Â Panel pi2;Â String s="";Â Â Font f12 = new Font("Times New Roman",Font.BO�
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