The department store commercial building had sales of 2.4 million yuan in May, an increase of 20% compared to April. How much was the sales volume of this building in April?
百货商业大楼，五月份销售额为240万元，比四月份增长20%，四月份该大楼的销售额多少万元？
<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">240 / (6/5)</gadget>
<output>200</output>

<result>200</result>