The experimental primary school will paste red paper on each side of a cube carton with a side length of 5dm, and use it as a "love donation box". How many square decimeters of red paper is needed to make 6 cartons like this?
实验小学要把一种棱长5dm的正方体纸箱的每一个面都贴上红纸，用来做"爱心捐款箱"．要做这样的6个纸箱，至少需要多少平方分米的红纸？
<gadget id="calculator">5 * 5 * 6 * 6</gadget>
<output>900</output>

<result>900</result>