a=8, b=6, c=4, d=2, the symbol "+" means the subtraction of two numbers, the symbol "-" means the division of two numbers, the symbol "/" means the addition of two numbers, please calculate (a /b+c)-d=how much.
a=8，b=6，c=4，d=2，符号"+"表示两数相减，符号"-"表示两数相除，符号"/"表示两数相加，请计算(a/b+c)-d=多少．
<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>