A number plus 40% of it equals 50% of 14. What is this number?
一个数加上它的40%正好等于14的50%，这个数是多少？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(1/2) / (7/5)</gadget>
<output>5/14 = around 0.357143</output>

<gadget id="calculator">14 * (5/14)</gadget>
<output>5</output>

<result>5</result>