A rectangle and a square have the same perimeter. The side length of the square is 5 meters, and the length of the rectangle is 7 meters. How many meters is it wide?
一块长方形地和一块正方形地的周长相等，正方形地的边长是5米，长方形地的长是7米，那么它的宽是几米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

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

<result>3</result>