Xiao Ming's kitchen is 4 meters long and 2.5 meters wide, and now he is going to lay square floor tiles with a side length of 2 decimeters in the kitchen. How many floor tiles should Xiao Ming's father buy?
小明家的厨房长4米，宽2.5米，现在准备在厨房里铺边长是2分米的正方形地砖，那小明的爸爸应该买多少块地砖？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">2.5 / (1/25)</gadget>
<output>62.5</output>

<gadget id="calculator">4 * 62.5</gadget>
<output>250</output>

<result>250</result>