text: function solve(input){
  
      let inputType = typeof(input);
      if (inputType === 'number'){
          let result = Math.pow(input, 2) * Math.PI;
          console.log(result.toFixed(2));
      } else {
          console.log(`We can not calculate the circle area, because we receive a ${inputType}.`)
  
      }
  
  }
  
  solve(5);
  solve('name')