There are 4 rectangular columns in the school auditorium, 5 meters high, and the bottom surface is a square with a side length of 3 decimeters. To paint these columns, it costs 25 yuan per square meter. How much is the total cost?
学校礼堂有4根长方体立柱，高5米，底面为边长3分米的正方形，要油漆这些立柱，按每平方米用25元的油漆算，一共要多少元？
<gadget id="calculator">3 * 5 * 4 * 4</gadget>
<output>240</output>

<gadget id="calculator">25 * 240</gadget>
<output>6_000</output>

<result>6_000</result>