After unfolding a square wire frame with a side length of 5 meters, fold it into a rectangular wire frame with a width of 3 meters. What is the long side of the rectangular wire frame?
把一个边长为5米的正方形铁丝框展开后，折成一个宽边为3米的长方形铁丝框，问长方形铁丝框的长边是多少？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<result>7</result>