The school uses square bricks to pave the floor of the office. If the square bricks with a side length of 4 decimeters are used to pave it, a total of 500 bricks are needed to pave it. If the square bricks with a side length of 5 decimeters are used instead, how many bricks are needed?
学校用方砖铺办公室的地面，如果用边长是4分米的方砖去铺，共需500块才能铺满，如果改用边长是5分米的方砖去铺，需要多少块？
<gadget id="calculator">4 * 4 * 500</gadget>
<output>8_000</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">8_000 / 25</gadget>
<output>320</output>

<result>320</result>