Dad used wooden strips to make two frames with a length of 6 decimeters and a width of 4 decimeters. How long did the wooden strips share?
爸爸用木条做了两个长6分米，宽4分米的镜框，共用了多长的木条？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">10 * 2 * 2</gadget>
<output>40</output>

<result>40</result>