((x-3.6)/4)=((x+4.8)/8).
((x-3.6)/4)=((x+4.8)/8)．
<gadget id="calculator">3.6 / 4</gadget>
<output>0.9</output>

<gadget id="calculator">4.8 / 8</gadget>
<output>0.6</output>

<gadget id="calculator">0.9 + 0.6</gadget>
<output>1.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/4) - (1/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1.5 / (1/8)</gadget>
<output>12</output>

<result>12</result>