Calculation: 3.49+4.47+3.51-2.38+4.53-2.62=how much.
计算：3.49+4.47+3.51-2.38+4.53-2.62=多少．
<gadget id="calculator">3.51 - 2.38</gadget>
<output>1.13</output>

<gadget id="calculator">4.53 - 2.62</gadget>
<output>1.91</output>

<gadget id="calculator">3.49 + 4.47 + 1.13 + 1.91</gadget>
<output>11</output>

<result>11</result>