Use a 64cm long iron wire to make a cuboid teaching aid. It is known that the length is 7cm, the width is 5cm, and the height is cm
用一根64cm长的铁丝做一个长方体的教具，已知长7cm，宽5cm，高是多少cm
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<result>4</result>