The difference between x minus 40 and divided by 6, the quotient is 7.8.
x减去40的差再除以6，商是7.8．
<gadget id="calculator">40 / 6</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">(20/3) + 7.8</gadget>
<output>14.466667</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">14.466667 / (1/6)</gadget>
<output>86.800002</output>

<result>86.800002</result>