The sum of the lengths of the sides of a cuboid is 52cm, the width is 4cm, and the height is 3cm. What is its length in cm?
一个长方体的棱长总和是52cm，宽4cm，高3cm，它的长是多少cm．
<gadget id="calculator">52 / 4</gadget>
<output>13</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">13 - 7</gadget>
<output>6</output>

<result>6</result>