To make a glass fish tank with a length of 6dm, a width of 4dm, and a height of 5dm, how much dm is required at least**2.
做一个长6dm，宽4dm，高5dm的无盖玻璃鱼缸，至少需要多少dm**2．
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">30 + 20</gadget>
<output>50</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">24 + 100</gadget>
<output>124</output>

<result>124</result>