The store's turnover this month is 5.342 million yuan, which is 439,000 yuan less than three times the previous month's turnover. How much was the store's turnover last month?
商店本月营业额为534.2万元，比上月营业额的3倍少43.9万，商店上月营业额为多少万元？
<gadget id="calculator">43.9 + 534.2</gadget>
<output>578.1</output>

<gadget id="calculator">578.1 / 3</gadget>
<output>192.7</output>

<result>192.7</result>