Grandma Zhang used a 19m long fence to form a rectangular chicken coop with a width of 3.5m. How many square meters is the chicken coop?
张奶奶用19m长的篱笆围成一个宽3.5m的长方形鸡舍．鸡舍的面积是多少平方米？
<gadget id="calculator">19 / 2</gadget>
<output>19/2 = around 9.5</output>

<gadget id="calculator">(19/2) - 3.5</gadget>
<output>6</output>

<gadget id="calculator">6 * 3.5</gadget>
<output>21</output>

<result>21</result>