(2+3.15+5.87)*(3.15+5.87+7.32)-(2+3.15+5.87+7.32)*(3.15+5.87)=how much.
(2+3.15+5.87)*(3.15+5.87+7.32)-(2+3.15+5.87+7.32)*(3.15+5.87)=多少．
<gadget id="calculator">2 + 3.15 + 5.87</gadget>
<output>11.02</output>

<gadget id="calculator">3.15 + 5.87 + 7.32</gadget>
<output>16.34</output>

<gadget id="calculator">11.02 * 16.34</gadget>
<output>180.0668</output>

<gadget id="calculator">2 + 3.15 + 5.87 + 7.32</gadget>
<output>18.34</output>

<gadget id="calculator">3.15 + 5.87</gadget>
<output>9.02</output>

<gadget id="calculator">18.34 * 9.02</gadget>
<output>165.4268</output>

<gadget id="calculator">180.0668 - 165.4268</gadget>
<output>14.64</output>

<result>14.64</result>