A cocoon station purchased 3.2 tons of cocoons last year, and this year plans to increase revenue by 20% compared to last year. Now that it has purchased 2.5 tons, how many tons need to be purchased to complete this year's plan?
某茧站去年收购茧3.2吨，今年计划比去年增收20%，现在已经收购2.5吨，还需收购多少吨就能完成今年计划？
<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">3.2 * (6/5)</gadget>
<output>3.84</output>

<gadget id="calculator">3.84 - 2.5</gadget>
<output>1.34</output>

<result>1.34</result>