title: How to multiply variables of a netcdf file with different constants using NCO or CDO?
body: <p>I have a netCDF file containing different variables (val1, val2, val3). The names of the variables are indicated, in fact, they are completely different from each other.
  I want to multiply the variables with different constants such as:</p>
  <pre><code>val1*c1 
  val2*c2 
  val3*c3
  </code></pre>
  <p>How I could do that with <code>NCO</code> or <code>CDO</code>?</p>