A cuboid iron block is cut into two identical cube iron blocks. The sum of the edge lengths of the two cube iron blocks is 16cm longer than the sum of the edge lengths of the original cuboid iron block. Find the length of the original cuboid iron block centimeter?
一个长方体铁块，被截成两个完全相同的正方体铁块，两个正方体铁块的棱长之和比原来长方体铁块的棱长之和增加了16cm，求原来长方体铁块的长是多少厘米？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>