χ-(3/5)χ=(6/5).
χ-(3/5)χ=(6/5)．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(6/5) / (2/5)</gadget>
<output>3</output>

<result>3</result>