A closed medicine glass container contains 100 liters of medicine. It is known that the lengths of the three edges intersecting at a vertex are 8 decimeters, 5 decimeters and 4 decimeters respectively. How many decimeters is the depth of the potion in the glass container at this time?
一个封闭的药品玻璃容器中盛了100升药水，已知相交于一个顶点的三条棱的长度分别是8分米，5分米，4分米．这时玻璃容器中药水的深度是多少分米？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">100 / 40</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>