A cube glass cylinder with a side length of 5cm (measured from the inside) is filled with water and the water depth is 1.5dm. A cylindrical iron block with a height of 2.6dm and a bottom area of 10dm**2 is placed in the glass cylinder. The bottom of the iron block is After the area is in full contact with the bottom of the glass tank, the water does not submerge the iron block. How much dm did the water level rise at this time?
一个棱长5cm(从里面量)的正方体玻璃缸，里面装有水，水深是1.5dm，在这个玻璃缸中放进高2.6dm，底面积10dm**2的圆柱形铁块，铁块底面积与玻璃缸底面完全接触后，水没有淹没铁块．此时水面上升了多少dm？
<gadget id="calculator">5 * 5 * 1.5</gadget>
<output>37.5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<gadget id="calculator">37.5 / 15</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 - 1.5</gadget>
<output>1</output>

<result>1</result>