It takes 1,500 pieces to pave a road with rectangular bricks with a length of 40 cm and a width of 24 cm. If it is paved with square bricks with a side length of 30 cm, how many pieces are needed?
用长40厘米，宽24厘米的长方形砖铺一条路，需1500块，如果改用边长30厘米的方砖铺，需用多少块？
<gadget id="calculator">40 * 24</gadget>
<output>960</output>

<gadget id="calculator">960 * 1_500</gadget>
<output>1_440_000</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<gadget id="calculator">1_440_000 / 900</gadget>
<output>1_600</output>

<result>1_600</result>