There are 4 cuboid columns in the middle of the auditorium. The bottom surface is a square with a side length of 50 cm and a height of 4 meters. If these columns are tiled, the area of the tiles is 25 square centimeters. How many small tiles do you need to prepare at least?
礼堂中间有4根长方体柱子，底面是边长50厘米的正方形，高4米，如果给这些柱子贴瓷砖，瓷砖的面积为25平方厘米，至少需要准备多少块小瓷砖？
<gadget id="calculator">4 * 100</gadget>
<output>400</output>

<gadget id="calculator">50 * 4 * 400</gadget>
<output>80_000</output>

<gadget id="calculator">4 / 25</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">80_000 * (4/25)</gadget>
<output>12_800</output>

<result>12_800</result>