A rectangular tin box with a length of 50 cm is cut off from each of its four corners to a square with a side length of 5 cm, and then made into a rectangular parallelepiped tin box without a cover. It is known that the volume of the iron box is 16 cubic decimeters. How many centimeters is the width of the original iron sheet?
一块长50厘米的长方形铁皮，在它的四个角各剪去一个边长是5厘米的正方形，然后做成一个无盖的长方体铁盒．已知铁盒的容积是16立方分米．原来铁皮的宽是多少厘米？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<gadget id="calculator">1_000 / 200</gadget>
<output>5</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<gadget id="calculator">80 + 5 + 5</gadget>
<output>90</output>

<result>90</result>