What is the reciprocal of the difference between 3 and (1/2)
3和(1/2)的差的倒数是多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 - (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1 / (5/2)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>