0.5x/(1/28)*6=7.
0.5x/(1/28)*6=7．
<gadget id="calculator">1 / 28</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">7 * (1/28)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">0.5 * 6</gadget>
<output>3</output>

<gadget id="calculator">(1/4) / 3</gadget>
<output>1/12 = around 0.083333</output>

<result>1/12 = around 0.083333</result>