Zhang Hong is going to lay floor tiles for the living room. Originally, 4 decimeters needed 400 tiles, but now he needs 5 decimeters. How many tiles are needed?
张宏准备给客厅铺地板砖，原先边长4分米的需要400块，现在改用边长5分米的地板砖，需要多少块？
<gadget id="calculator">4 * 4 * 400</gadget>
<output>6_400</output>

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

<gadget id="calculator">6_400 / 25</gadget>
<output>256</output>

<result>256</result>