A square piece of iron sheet has a side length of (5/2) meters, and it takes (3/4) square meters to make a cuboid iron bucket, how many square meters are left?
一块正方形的铁皮，它的边长是(5/2)米，做一只长方体的铁桶用去(3/4)平方米，还剩多少平方米？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) * (5/2)</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(25/4) - (3/4)</gadget>
<output>11/2 = around 5.5</output>

<result>11/2 = around 5.5</result>