Xiaogang's kitchen floor is 3 meters long and 2 meters wide. Use square floor tiles with a side length of 2 decimeters to pave the kitchen floor, how many such floor tiles are needed?
小刚家的厨房地面长3米，宽2米．用边长是2分米的正方形地砖铺厨房地面，需要这样的地砖多少块？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

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

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<result>150</result>