text: var num = window.document.getElementById('numero')
  var tab = window.document.getElementById('seltab')
  
  function clicar(){
      if(Number(num.value) == 0){
          alert('[ERRO]')
      } else{
          var n = Number(num.value)
          c = 1
          tab.innerHTML = ''
          for(c = 1; c <= 10; c++){
              var item = window.document.createElement('option')
              item.text = `${n} x ${c} = ${n*c}`
              tab.appendChild(item)
          }
          num.value = ''
          num.focus()
          
      }
  }