Solve the equation: x-(1/2)/(3/8)=3.5.
解方程：x-(1/2)/(3/8)=3.5．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">3.5 * (3/8)</gadget>
<output>1.3125</output>

<gadget id="calculator">(1/2) + 1.3125</gadget>
<output>1.8125</output>

<gadget id="calculator">1.8125 / (3/8)</gadget>
<output>4.833333</output>

<result>4.833333</result>