The turnover of a shopping mall in the second half of December is 5.2 million yuan, which is an increase of (1/4) compared with the first half month. How much is the turnover in the first half month?
某商场12月下半月的营业额是520万元，比上半月增加了(1/4)，上半月的营业额是多少万元？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">520 / (5/4)</gadget>
<output>416</output>

<result>416</result>