Aunt Wang's house originally had a rectangular vegetable field, 60 meters long and 32 meters wide, surrounded by a fence. Now it is planned to reduce the length of this vegetable field by 15 meters, so how many meters will the fence be reduced?
王大妈家原有一块长方形菜地，长60米，宽32米，这块地的四周围了一圈篱笆．现在打算把这块菜地的长减少15米，那么所用的篱笆将减少多少米．
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<result>30</result>