12 How much is it after increasing by 20%.
12增加20%后是多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">12 * (6/5)</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>