A rectangle has an area of 78dm and a width of 6dm, what is its perimeter in dm?
一个长方形面积是78dm，宽是6dm，它的周长是多少dm．
<gadget id="calculator">78 / 6</gadget>
<output>13</output>

<gadget id="calculator">13 + 6</gadget>
<output>19</output>

<gadget id="calculator">19 * 2</gadget>
<output>38</output>

<result>38</result>