The turnover of the small supermarket for the whole day on Tuesday is 1200 yuan, which is 1/3 more than the turnover on Monday. How much is the turnover for the whole day on Monday?
小小超市周二全天的营业额是1200元，比周一的营业额多(1/3)．周一全天的营业额是多少元？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1_200 / (4/3)</gadget>
<output>900</output>

<result>900</result>