Calculation: (31/9)-(40/29)-(47/29).
计算：(31/9)-(40/29)-(47/29)．
<gadget id="calculator">31 / 9</gadget>
<output>31/9 = around 3.444444</output>

<gadget id="calculator">40 / 29</gadget>
<output>40/29 = around 1.37931</output>

<gadget id="calculator">47 / 29</gadget>
<output>47/29 = around 1.62069</output>

<gadget id="calculator">(31/9) - (40/29) - (47/29)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>