It costs 600 yuan to pave a classroom with square bricks with a side length of 0.3 meters. If you use square bricks with a side length of 5 decimeters instead, how many pieces will you need? (Solution of column equation)
用边长0.3米的方砖给一间教室铺地，要600块，如果改用边长5分米的方砖来铺，需要多少块？(列方程解)
<gadget id="calculator">0.3 * 0.3 * 600</gadget>
<output>54</output>

<gadget id="calculator">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">54 / 0.25</gadget>
<output>216</output>

<result>216</result>