To pave the floor with square bricks, if you use square bricks with a side length of 6 decimeters, you need 400 pieces. If you use square bricks with a side length of 5 decimeters instead, how many pieces will you need?
用方砖铺地，如果用边长6分米的方砖，需要400块．如果改用边长5分米的方砖，要多少块？
<gadget id="calculator">6 * 6 * 400</gadget>
<output>14_400</output>

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

<gadget id="calculator">14_400 / 25</gadget>
<output>576</output>

<result>576</result>