A cube of wood has side lengths of 15 cm. If cut off from its eight vertices, the edge lengths are 1, 2, 3, 4, 5, 6, 7, and 8 centimeters respectively. What is the minimum surface area in square centimeters of the rest of the block?
一个正方体木块，棱长是15厘米．如果从它的八个顶点处各截去棱长分别是1、2、3、4、5、6、7、8厘米的小正方体．这个木块剩下部分的表面积最少是多少平方厘米？
<gadget id="calculator">15 * 15 * 6</gadget>
<output>1_350</output>

<gadget id="calculator">7 * 7 * 2</gadget>
<output>98</output>

<gadget id="calculator">1_350 - 98</gadget>
<output>1_252</output>

<result>1_252</result>