A conference room with a length of 12 meters and a width of 9 meters is paved with one kind of square bricks. Before that, 120 bricks were used to pave 36 square meters. How many square bricks are needed after the rest are finished?
用一种方砖铺一间长12米、宽9米的会议室，之前用120块铺了36平方米，余下的全部铺完还要多少块方砖？
<gadget id="calculator">12 * 9</gadget>
<output>108</output>

<gadget id="calculator">108 - 36</gadget>
<output>72</output>

<gadget id="calculator">36 / 120</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">72 / (3/10)</gadget>
<output>240</output>

<result>240</result>