Uncle Wang won the grand prize and paid 20% of the personal income tax; 120,000 yuan was used to fund the Hope Project; the remaining 200,000 yuan was the child's education reserve. How much did Uncle Wang win the grand prize?
王叔叔中得大奖，缴纳20%的个人所得税；12万元资助希望工程；还剩20万元是孩子的教育储备金．王叔叔中得大奖到底是多少钱？
<gadget id="calculator">12 + 20</gadget>
<output>32</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">32 / (4/5)</gadget>
<output>40</output>

<result>40</result>