There is a pebble with a volume of 1 cubic decimeter in a glass container filled with water. The side length of this glass container is 2dm. If the pebble is carefully taken out, what is the water depth of this glass container now?
一个注满水的玻璃容器里有一个体积为1立方分米的鹅卵石，这个玻璃容器的棱长是2dm，如果把这个鹅卵石小心翼翼取出后，现在这个玻璃容器的水深应是多少？
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">(7/2) * 2</gadget>
<output>7</output>

<gadget id="calculator">7 / 4</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>