8.1*1.3-8/1.3+1.9*1.3+11.9/1.3=how much.
8.1*1.3-8/1.3+1.9*1.3+11.9/1.3=多少．
<gadget id="calculator">8.1 * 1.3</gadget>
<output>10.53</output>

<gadget id="calculator">8 / 1.3</gadget>
<output>6.153846</output>

<gadget id="calculator">10.53 - 6.153846</gadget>
<output>4.376154</output>

<gadget id="calculator">1.9 * 1.3</gadget>
<output>2.47</output>

<gadget id="calculator">11.9 / 1.3</gadget>
<output>9.153846</output>

<gadget id="calculator">4.376154 + 2.47 + 9.153846</gadget>
<output>16</output>

<result>16</result>