A thing is 120 yuan, the price is increased by 30% first, and then 20% off, the original (120 yuan), the profit rate is 50%. How much does it become now.
一款东西120元，先涨价30%，再打8折，原来(120元)，利润率为50%．则现在变为多少．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 * (13/10) * (4/5)</gadget>
<output>624/5 = around 124.8</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">120 / (3/2)</gadget>
<output>80</output>

<gadget id="calculator">(624/5) - 80</gadget>
<output>224/5 = around 44.8</output>

<gadget id="calculator">(224/5) / 80</gadget>
<output>14/25 = around 0.56</output>

<result>14/25 = around 0.56</result>