A classroom is 9.6m long and 7.2m wide. If square bricks with a side length of 0.8m are used to pave the floor, how many square bricks are needed at least?
一间教室长9.6m，宽7.2m，如果用边长是0.8m的方砖铺地，至少需要多少块方砖．
<gadget id="calculator">0.8 * 0.8</gadget>
<output>0.64</output>

<gadget id="calculator">7.2 / 0.64</gadget>
<output>11.25</output>

<gadget id="calculator">9.6 * 11.25</gadget>
<output>108</output>

<result>108</result>