(1-(12-(1/2)+(1/10))*2(1/2))/(25/11).
(1-(12-(1/2)+(1/10))*2(1/2))/(25/11)．
<gadget id="calculator">25 / 11</gadget>
<output>25/11 = around 2.272727</output>

<gadget id="calculator">28 / (25/11)</gadget>
<output>308/25 = around 12.32</output>

<result>308/25 = around 12.32</result>