Calculation: (2.35+1.34+5.21)*(1.98+6.91+10)-(2.35+1.34+5.21+10)*(1.98+6.91)=how much.
计算：(2.35+1.34+5.21)*(1.98+6.91+10)-(2.35+1.34+5.21+10)*(1.98+6.91)=多少．
<gadget id="calculator">2.35 + 1.34 + 5.21</gadget>
<output>8.9</output>

<gadget id="calculator">1.98 + 6.91 + 10</gadget>
<output>18.89</output>

<gadget id="calculator">8.9 * 18.89</gadget>
<output>168.121</output>

<gadget id="calculator">2.35 + 1.34 + 5.21 + 10</gadget>
<output>18.9</output>

<gadget id="calculator">1.98 + 6.91</gadget>
<output>8.89</output>

<gadget id="calculator">18.9 * 8.89</gadget>
<output>168.021</output>

<gadget id="calculator">168.121 - 168.021</gadget>
<output>0.1</output>

<result>0.1</result>