The actual production value of a factory is 120% of the plan, how much is the actual overproduction
某工厂实际完成产值是计划的120%，实际超产多少
<gadget id="calculator">120 / 100</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) - 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>