One aluminum alloy mirror cabinet bar is planned to make 20 triangular mirror cabinets. Later, the length of each side of each mirror cabinet was reduced by 2 cm, and as a result, 5 more cabinets were made. How many cm is the length of this aluminum alloy mirror cabinet?
一根铝合金镜柜条，计划可做20个三角形镜柜．后来，每个镜柜每边长减少2cm，结果多做了5只，这根铝合金镜柜条长多少cm？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 * 3 * (2/5)</gadget>
<output>24</output>

<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">24 * 25</gadget>
<output>600</output>

<result>600</result>