Duojia bought a house in May 2014, with a total price of 500,000, with a down payment of 60%, and the rest will be paid in two years, 20% of the total price will be paid one year later, with an annual interest of 5%, and the total price will be paid after two years 20% of the rent and 6% annual interest. Please do the math. When the house payment is paid off, how much has Duojia paid in total?
多多家2014年5月买了一套房子，总价50万，首付60%，余下的分两年付清，一年后付总价的20%，年息5%，两年后付总价的20%，年息6%，请你算一算，到付清房款时，多多家共支付了多少万元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">50 * (1/5) * (3/50) * 2</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">50 * (1/5) * (1/20)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 + (6/5) + (1/2)</gadget>
<output>517/10 = around 51.7</output>

<result>517/10 = around 51.7</result>