There are 8 cubes whose surfaces are covered with green paint, and their edge lengths are 7, 9, 11, ..., 21. If all these cubes are sawed into small cubes with edge length 1, how many of these cubes are there? At least one side is painted.
有8个表面涂满绿漆的正方体，其棱长分别为7，9，11，…，21，若把这些正方体全部锯成棱长为1的小正方体，在这些小正方体中，有多少个至少是一面有漆．
<gadget id="calculator">7 * 7 * 2</gadget>
<output>98</output>

<gadget id="calculator">7 * 5 * 2</gadget>
<output>70</output>

<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<gadget id="calculator">98 + 70 + 50</gadget>
<output>218</output>

<gadget id="calculator">9 * 9 * 2</gadget>
<output>162</output>

<gadget id="calculator">9 * 7 * 2</gadget>
<output>126</output>

<gadget id="calculator">162 + 126 + 98</gadget>
<output>386</output>

<gadget id="calculator">11 * 11 * 2</gadget>
<output>242</output>

<gadget id="calculator">11 * 9 * 2</gadget>
<output>198</output>

<gadget id="calculator">242 + 198 + 162</gadget>
<output>602</output>

<gadget id="calculator">13 * 13 * 2</gadget>
<output>338</output>

<gadget id="calculator">13 * 11 * 2</gadget>
<output>286</output>

<gadget id="calculator">338 + 286 + 242</gadget>
<output>866</output>

<gadget id="calculator">15 * 15 * 2</gadget>
<output>450</output>

<gadget id="calculator">15 * 13 * 2</gadget>
<output>390</output>

<gadget id="calculator">450 + 390 + 338</gadget>
<output>1_178</output>

<gadget id="calculator">17 * 17 * 2</gadget>
<output>578</output>

<gadget id="calculator">17 * 15 * 2</gadget>
<output>510</output>

<gadget id="calculator">578 + 510 + 450</gadget>
<output>1_538</output>

<gadget id="calculator">19 * 19 * 2</gadget>
<output>722</output>

<gadget id="calculator">19 * 17 * 2</gadget>
<output>646</output>

<gadget id="calculator">722 + 646 + 578</gadget>
<output>1_946</output>

<gadget id="calculator">21 * 21 * 2</gadget>
<output>882</output>

<gadget id="calculator">21 * 19 * 2</gadget>
<output>798</output>

<gadget id="calculator">882 + 798 + 722</gadget>
<output>2_402</output>

<gadget id="calculator">218 + 386 + 602 + 866 + 1_178 + 1_538 + 1_946 + 2_402</gadget>
<output>9_136</output>

<result>9_136</result>