cuboid glass contains water, the height of the water is 2.5 cm, and the bottom area inside the glass is 72 square centimeters. After putting a 6 cm cube iron block into the glass, the iron block is not completely submerged. At this time What is the height of the water?
一个长方体玻璃杯中盛有水，水的高度是2.5厘米，玻璃杯内侧的底面积是72平方厘米，在这个杯中放进一个6厘米的正方体铁块后，铁块没有完全浸没，这时水的高度为多少？
<gadget id="calculator">72 * 2.5</gadget>
<output>180</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">72 - 36</gadget>
<output>36</output>

<gadget id="calculator">180 / 36</gadget>
<output>5</output>

<result>5</result>