cuboid wooden box without a cover is 9 decimeters in length, 5 decimeters in width, and 4 decimeters in height. It is necessary to paint both the inside and the outside of the wooden box. How many square decimeters is the painted area?
一个无盖的长方体木箱，长9分米，宽5分米，高4分米，要给木箱的里面和外面都涂漆，涂漆的面积是多少平方分米？
<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">36 + 20</gadget>
<output>56</output>

<gadget id="calculator">56 * 2</gadget>
<output>112</output>

<gadget id="calculator">45 + 112</gadget>
<output>157</output>

<gadget id="calculator">157 * 2</gadget>
<output>314</output>

<result>314</result>