What is the sum of (2/5) and its reciprocal
(2/5)和它倒数的和是多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(5/2) + (2/5)</gadget>
<output>29/10 = around 2.9</output>

<result>29/10 = around 2.9</result>