After increasing 80 by 80%, then reducing it by 10%, what is the result?
把80增加80%后，再减少10%，结果是多少．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">80 * (9/5) * (9/10)</gadget>
<output>648/5 = around 129.6</output>

<result>648/5 = around 129.6</result>