For a classroom, it costs 240 pieces to pave the floor with square bricks with a side length of 5 decimeters; how many pieces would it cost to use square bricks with a side length of 4 decimeters instead? (Answer with proportional knowledge)
一间教室，用边长5分米的方砖铺地要240块；如果改用边长是4分米的方砖要多少块？(用比例知识解答)
<gadget id="calculator">5 * 5 * 240</gadget>
<output>6_000</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">6_000 / 16</gadget>
<output>375</output>

<result>375</result>