The school has surrounded a rectangular vegetable field with a 240m long fence as a practical activity base for sixth graders. If the length of this vegetable field is 82.5m, how many meters is the width of this vegetable field? (solution by equation)
学校用240m长的篱笆围了一块长方形菜地作为六年级学生的实践活动基地，如果这块菜地的长是82.5m，那么这块菜地的宽是多少米？(用方程解)
<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<gadget id="calculator">120 - 82.5</gadget>
<output>37.5</output>

<result>37.5</result>