The floor of Xiao Ming's room is a square, and now it needs to be paved with floor tiles. Whether you choose a square floor tile with a side length of 50cm or a square floor tile with a side length of 60cm, it is just covered. How many square meters is the floor of Xiao Ming's room at least?
小明房间的地面是一个正方形，现在要铺地砖．无论选择边长是50cm的正方形地砖，还是选择边长是60cm的正方形地砖，都正好铺满．小明房间的地面至少是多少平方米？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 / 100 / 100</gadget>
<output>3/500 = around 0.006</output>

<gadget id="calculator">50 * (1/2) * 60 * (3/500)</gadget>
<output>9</output>

<result>9</result>