A cuboid, the base is a square with a side length of 1 decimeter, and its side view is also a square. What is the volume of this cuboid?
一个长方体，底面是一个边长1分米的正方形，它的侧面展开图也是一个正方形，这个长方体的体积是多少立方分米？
<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">1 * 1 * 4</gadget>
<output>4</output>

<result>4</result>