The floor of Xiaomei's study is rectangular, 3 meters long and 2 meters wide, and the floor tiles with an area of 4 square decimeters are used to pave the study floor. How many tiles are needed in total?
小梅书房的地面是长方形的，长3米，宽2米，用面积是4平方分米的地砖铺书房地面，一共需要多少块？
<gadget id="calculator">2 / 0.04</gadget>
<output>50</output>

<gadget id="calculator">3 * 50</gadget>
<output>150</output>

<result>150</result>