The toy processing factory should dye the six sides of the building block in the shape of a small cube, dye two sides red, two sides blue, and the other two sides yellow. The machine in the factory can dye the same color on one side of 6 small cubes at the same time, and it takes 5 minutes each time. Now there are 8 building blocks to be processed, so how many minutes will it take at least to complete with this machine?
玩具加工厂要把小正方体形状积木的六个面染色，两个面染红色，两个面染蓝色，另两个面染黄色．厂里的机器可以同时给6个小正方体的一面染上相同的颜色，每次需要5分钟．现在有8个积木要加工，那么用这种机器至少需要多少分钟才能完成？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>