Pack 14kg of apples in three wooden crates with the same mass. It is known that the weight of the first crate is (53/10) kg, the weight of the second crate is (41/5) kg, and the weight of the third crate is (13/10) kg. /2)kg, find the weight of an empty wooden box in kilograms.
把14kg苹果装在三个质量相同的木箱里，已知第一箱连箱重(53/10)kg，第二箱连箱重(41/5)kg，第三箱连箱重(13/2)kg，求一只空木箱重多少千克．
<gadget id="calculator">53 / 10</gadget>
<output>53/10 = around 5.3</output>

<gadget id="calculator">41 / 5</gadget>
<output>41/5 = around 8.2</output>

<gadget id="calculator">13 / 2</gadget>
<output>13/2 = around 6.5</output>

<gadget id="calculator">(13/2) - 14</gadget>
<output>-15/2 = around -7.5</output>

<gadget id="calculator">(53/10) + (41/5) + (-15/2)</gadget>
<output>6</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<result>2</result>