If the length of a rectangle is reduced by 5 decimeters and the width is increased by 8 decimeters, how many centimeters will the perimeter increase?
一个长方形，长减少5分米，宽增加8分米，周长增加多少厘米．
<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<result>60</result>