rectangular playground is 60 meters long. After expansion, the length increases by 15 meters and the width increases by 8 meters. The area of the expanded playground increases by 1275 square meters. What is the original width of the playground?
一个长方形操场长60米，扩建后长增加15米，宽增加8米，扩建成的操场面积增加1275平方米．操场原来的宽是多少米．
<gadget id="calculator">60 * 8</gadget>
<output>480</output>

<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">1_275 - 480 - 120</gadget>
<output>675</output>

<gadget id="calculator">675 / 15</gadget>
<output>45</output>

<result>45</result>