What is the sum of all the proper fractions whose unit of fraction is (1/4)
分数单位是(1/4)的所有真分数的和应是多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/4) + (1/2) + (3/4)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>