After cutting off a cube with a side length of 4 cm from a cuboid, what remains is a cuboid. The surface area of this cuboid is 64 square centimeters. How many centimeters is the longest side of the original cuboid?
从一个长方体上截下一个棱长4厘米的正方体后，剩下的是一个长方体，这个长方体的表面积是64平方厘米，原来长方体最长的一条棱是多少厘米？
<gadget id="calculator">4 * 4 * 2</gadget>
<output>32</output>

<gadget id="calculator">64 - 32</gadget>
<output>32</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">32 / 16</gadget>
<output>2</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<result>6</result>