text: import React from 'react';
  import PropTypes from 'prop-types';
  import './Button.css';
  
  const Button = ({ label, handleClick }) => (
    <button
      type="button"
      onClick={handleClick}
      className={`btn ${label === '0' ? 'btn--span-2' : ''} ${['=', '+', '-', 'X', '÷'].includes(label) ? 'btn--orange' : ''}`}
    >
      {label}
    </button>
  );
  
  Button.propTypes = {
    label: PropTypes.string.isRequired,
    handleClick: PropTypes.func.isRequired,
  };
  
  export default Button;
  