The kitchen floor of Chen Jun’s house is 6 meters long and 3 meters wide. How many square floor tiles with a side length of 2 decimeters are needed to pave the kitchen floor?
陈俊家的厨房地面长6米，宽3米，用边长为2分米的正方形地砖铺厨房地面，需要多少块？
<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">30 / 4</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">60 * (15/2)</gadget>
<output>450</output>

<result>450</result>