A square piece of iron sheet has a side length of (7/8) meters, and it takes (23/32) 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(7/8)米，做一只长方体的铁桶用去(23/32)平方米，还剩多少平方米？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(7/8) * (7/8)</gadget>
<output>49/64 = around 0.765625</output>

<gadget id="calculator">23 / 32</gadget>
<output>23/32 = around 0.71875</output>

<gadget id="calculator">(49/64) - (23/32)</gadget>
<output>3/64 = around 0.046875</output>

<result>3/64 = around 0.046875</result>