To decorate the speech room, it takes 100 pieces to pave the floor with anti-static square bricks with an area of 16 decimeters. If the floor is paved with square bricks with a side length of 5 decimeters, how many pieces are needed?
装修语音室，用面积16平方分米的防静电方砖铺地，需100块，如果改用边长5分米的方砖铺地，需要多少块？
<gadget id="calculator">16 * 100</gadget>
<output>1_600</output>

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

<gadget id="calculator">1_600 / 25</gadget>
<output>64</output>

<result>64</result>