If the output of a factory in March is 30% higher than that in February, and the output in February is 20% higher than that in January, how much is the output in March higher than in January?
某工厂，3月份比2月份产量高30%，2月份比1月份产量高20%，则3月份比1月份高多少．
<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">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">1 * (6/5) * (13/10)</gadget>
<output>39/25 = around 1.56</output>

<gadget id="calculator">(39/25) - 1</gadget>
<output>14/25 = around 0.56</output>

<gadget id="calculator">(14/25) / 1</gadget>
<output>14/25 = around 0.56</output>

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