In 2010, the national grain production overcame the unfavorable situation of previous drought and achieved a bumper harvest. Taking Dongle Township as an example, the total grain output reached 47,300 jin, an increase of 10% over the previous year. How many jin was the grain output last year?
2010全国粮食生产克服了前期干旱的不利局面，取得了大丰收．以东乐乡为例，粮食总产量达4.73万斤，比上年增产了10%，上一年粮食产量是多少万斤？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">4.73 / (11/10)</gadget>
<output>4.3</output>

<result>4.3</result>