If a classroom is paved with square bricks with a side length of 30 cm, it needs 800 pieces. If it is replaced with square bricks with a side length of 0.6 meters, how many pieces are needed?
一间教室，如果用边长30厘米的方砖，需要800块，如果改用边长0.6米的方砖铺，需要多少块？
<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<gadget id="calculator">900 * 800</gadget>
<output>720_000</output>

<gadget id="calculator">0.6 * 100</gadget>
<output>60</output>

<gadget id="calculator">60 * 60</gadget>
<output>3_600</output>

<gadget id="calculator">720_000 / 3_600</gadget>
<output>200</output>

<result>200</result>