Pave the floor for the living room, use square bricks with a side length of 60 cm, and 100 pieces can be fully paved. If it is replaced by a square brick with a side length of 5 decimeters, how many square bricks are needed at least?
给客厅铺地转，用边长60厘米的方砖铺，100块可铺满．如果换作边长是5分米的方砖，至少需要多少块方砖？
<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">6 * 6 * 100</gadget>
<output>3_600</output>

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

<gadget id="calculator">3_600 / 25</gadget>
<output>144</output>

<result>144</result>