120 tons increase its 10%, then reduce it by 10%, the result is how many tons
120吨增加它的10%，以后再减少10%，结果是多少吨
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">120 * (11/10)</gadget>
<output>132</output>

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

<gadget id="calculator">132 * (9/10)</gadget>
<output>594/5 = around 118.8</output>

<result>594/5 = around 118.8</result>