The turnover of a shopping mall in October this year is 1.2 million yuan, an increase of 20% compared with September. How much is the turnover in September? What is the correct column
某商场今年十月份的营业额是120万元，比九月份增长20%，九月份营业额是多少万元？正确列式是多少
<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">120 / (6/5)</gadget>
<output>100</output>

<result>100</result>