The school playground was originally 68 meters long and 36 meters wide. The length of the playground remains the same. After the expansion, the area is 3332 square meters. How many meters has the width of the playground increased?
学校操场原来长68米，宽36米．操场长度不变，扩建后面积为3332平方米，操场宽度增加了多少米．
<gadget id="calculator">3_332 / 68</gadget>
<output>49</output>

<gadget id="calculator">49 - 36</gadget>
<output>13</output>

<result>13</result>