The number that is twice (1/4) more than a number is (1/4), find this number (use the equation to solve)
比一个数的2倍多(1/4)的数是(1/4)，求这个数(用方程解)
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

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

<gadget id="calculator">(1/4) / (5/2)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>