The turnover of Hongqi Supermarket in March was 300,000 yuan, and the turnover in April increased by (1/5) compared to March. How much did the turnover in April increase by 10,000 yuan?
红旗超市三月份的营业额是30万元，四月份的营业额比三月份增加了(1/5)，四月份的营业额增加了多少万元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>