A conference room needs 800 pieces of square bricks with a side length of 5 decimeters to pave the floor. If it is replaced with square bricks with a side length of 1 meter, how many pieces are needed? (Solve with ratio)
一间会议室，用一种边5分米的方砖铺地，需800块，在如果换成边长为1米的方砖，需要多少块？(用比例解)
<gadget id="calculator">5 * 5 * 800</gadget>
<output>20_000</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">20_000 / 100</gadget>
<output>200</output>

<result>200</result>