If a house needs to be paved with square bricks, 3,200 pieces are needed for square bricks with an area of 9 square decimeters. If square bricks with an area of 16 square decimeters are used, how many pieces are needed? (Solution with proportional knowledge)
一间房子要用方砖铺地，用面积9平方分米的方砖，需要3200块，若用面积16平方分米的方砖，需要多少块？(用比例知识解)
<gadget id="calculator">3_200 * 9</gadget>
<output>28_800</output>

<gadget id="calculator">28_800 / 16</gadget>
<output>1_800</output>

<result>1_800</result>