house is paved with square bricks with an area of 4 square decimeters, and 108 square bricks are needed to be completely paved. If the floor is paved with square bricks with a side length of 3 decimeters, how many bricks are needed to pave the floor? (Solve with ratio)
一间房子，用面积是4平方分米的方砖铺地，需要108块正好铺满．如果改用边长3分米的方砖铺地，需要多少块才能铺满？(用比例解)
<gadget id="calculator">4 * 108</gadget>
<output>432</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">432 / 9</gadget>
<output>48</output>

<result>48</result>