get value datapicker and set value other textfield

Help me please - get value datapicker and set value other textfield

this is my form

<div class="col-sm-2" style="width: 24%">

      &lt;?php  echo &#036;form-&gt;field(&#036;model, 'data_nasc')-&gt;widget(DateControl::classname(), [





          'type'=&gt;DateControl::FORMAT_DATE,


          'displayFormat' =&gt; 'd/M/y',


          'saveFormat' =&gt; 'y-M-d',


         


      ]);  ?&gt; 


  


&lt;/div&gt;








 &lt;div class=&quot;col-sm-2&quot; style=&quot;width: 25%&quot;&gt;


         


        &lt;?= &#036;form-&gt;field(&#036;model, 'idade_crianca', [ 


             'addon' =&gt; ['prepend' =&gt; ['content'=&gt;'Idade da Criança']],


          


              ])-&gt;textInput(['readonly' =&gt; true]);  


        ?&gt; 


     


    &lt;/div&gt;