<div class="uno">Hola Devcode</div>
<div class="dos">Hola Devcode</div>
@function numero($num: 500px){
  @return  $num/2;
}

.uno {
  width: numero();
  background-color: orange;
  text-align: center;
}

.dos {
  width: numero(600px);
  background-color: aqua;
  text-align: center;
}

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