The length of the fish tank is 4dm, the width is 2dm, and the height is 1.5dm. How much glass should be used to make the fish tank in dm**2.
鱼缸长4dm，宽2dm，高1.5dm，做这个鱼缸需用玻璃多少dm**2．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">4 * 1.5 * 2</gadget>
<output>12</output>

<gadget id="calculator">2 * 1.5 * 2</gadget>
<output>6</output>

<gadget id="calculator">8 + 12 + 6</gadget>
<output>26</output>

<result>26</result>